# Number 43

## Properties#

- 43 is 9th additive prime because sum of its digits is 7 which is also prime
- 43 is 1st centered heptagonal prime for n = 4
- 43 is part of 6th cousin prime {
**43**, 47} - 43 is 9th left-truncatable prime
- 43 is 6th lucky prime
- 43 is 14th prime
- 43 is part of 7th prime triplet {41,
**43**, 47} - 43 is part of 6th prime triplet {37, 41,
**43**} - 43 is part of 8th sexy prime {37,
**43**} - 43 is part of 5th sexy prime triplet {31, 37,
**43**} - 43 is part of 6th twin prime {41,
**43**} - 43 is 3rd wagstaff prime

## External#

## Neighbours#

31_{18} | 32 | 33_{1} | 34_{1} | 35_{1} |

36 | 37_{18} | 38_{1} | 39_{1} | 40 |

41_{18} | 42 | 43_{12} | 44 | 45 |

46_{1} | 47_{21} | 48 | 49_{1} | 50 |

51_{1} | 52 | 53_{18} | 54 | 55_{1} |

## Compare with#

31_{18} | 32 | 33_{1} | 34_{1} | 35_{1} |

36 | 37_{18} | 38_{1} | 39_{1} | 40 |

41_{18} | 42 | 43_{12} | 44 | 45 |

46_{1} | 47_{21} | 48 | 49_{1} | 50 |

51_{1} | 52 | 53_{18} | 54 | 55_{1} |

## Different Representations#

- 43 in roman numerals is XLIII
- 43 in base 2 is 101011
_{2} - 43 in base 3 is 1121
_{3} - 43 in base 4 is 223
_{4} - 43 in base 5 is 133
_{5} - 43 in base 6 is 111
_{6} - 43 in base 7 is 61
_{7} - 43 in base 8 is 53
_{8} - 43 in base 9 is 47
_{9} - 43 in base 10 is 43
_{10} - 43 in base 11 is 3a
_{11} - 43 in base 12 is 37
_{12} - 43 in base 13 is 34
_{13} - 43 in base 14 is 31
_{14} - 43 in base 15 is 2d
_{15} - 43 in base 16 is 2b
_{16}

## Belongs Into#

- 43 belongs into first 10 additive primes.
- 43 belongs into first 10 centered heptagonal primes.
- 43 belongs into first 10 cousin primes.
- 43 belongs into first 10 left-truncatable primes.
- 43 belongs into first 10 lucky primes.
- 43 belongs into first 50 primes.
- 43 belongs into first 10 prime triplets.
- 43 belongs into first 10 prime triplets.
- 43 belongs into first 10 sexy primes.
- 43 belongs into first 10 sexy prime triplets.
- 43 belongs into first 10 twin primes.
- 43 belongs into first 10 wagstaff primes.

## You May Also Ask#

- Is 43 additive prime?
- Is 43 bell prime?
- Is 43 carol prime?
- Is 43 centered decagonal prime?
- Is 43 centered heptagonal prime?
- Is 43 centered square prime?
- Is 43 centered triangular prime?
- Is 43 chen prime?
- Is 43 class 1+ prime?
- Is 43 part of cousin prime?
- Is 43 cuban prime 1?
- Is 43 cuban prime 2?
- Is 43 cullen prime?
- Is 43 dihedral prime?
- Is 43 double mersenne prime?
- Is 43 emirps?
- Is 43 euclid prime?
- Is 43 factorial prime?
- Is 43 fermat prime?
- Is 43 fibonacci prime?
- Is 43 genocchi prime?
- Is 43 good prime?
- Is 43 happy prime?
- Is 43 harmonic prime?
- Is 43 isolated prime?
- Is 43 kynea prime?
- Is 43 left-truncatable prime?
- Is 43 leyland prime?
- Is 43 long prime?
- Is 43 lucas prime?
- Is 43 lucky prime?
- Is 43 mersenne prime?
- Is 43 mills prime?
- Is 43 multiplicative prime?
- Is 43 palindromic prime?
- Is 43 pierpont prime?
- Is 43 pierpont prime of the 2nd kind?
- Is 43 prime?
- Is 43 part of prime quadruplet?
- Is 43 part of prime quintuplet 1?
- Is 43 part of prime quintuplet 2?
- Is 43 part of prime sextuplet?
- Is 43 part of prime triplet?
- Is 43 proth prime?
- Is 43 pythagorean prime?
- Is 43 quartan prime?
- Is 43 restricted left-truncatable prime?
- Is 43 restricted right-truncatable prime?
- Is 43 right-truncatable prime?
- Is 43 safe prime?
- Is 43 semiprime?
- Is 43 part of sexy prime?
- Is 43 part of sexy prime quadruplets?
- Is 43 part of sexy prime triplet?
- Is 43 solinas prime?
- Is 43 sophie germain prime?
- Is 43 super prime?
- Is 43 thabit prime?
- Is 43 thabit prime of the 2nd kind?
- Is 43 part of twin prime?
- Is 43 two-sided prime?
- Is 43 ulam prime?
- Is 43 wagstaff prime?
- Is 43 weakly prime?
- Is 43 wedderburn-etherington prime?
- Is 43 wilson prime?
- Is 43 woodall prime?

## Smaller than 43#

- Additive primes up to 43
- Bell primes up to 43
- Carol primes up to 43
- Centered decagonal primes up to 43
- Centered heptagonal primes up to 43
- Centered square primes up to 43
- Centered triangular primes up to 43
- Chen primes up to 43
- Class 1+ primes up to 43
- Cousin primes up to 43
- Cuban primes 1 up to 43
- Cuban primes 2 up to 43
- Cullen primes up to 43
- Dihedral primes up to 43
- Double mersenne primes up to 43
- Emirps up to 43
- Euclid primes up to 43
- Factorial primes up to 43
- Fermat primes up to 43
- Fibonacci primes up to 43
- Genocchi primes up to 43
- Good primes up to 43
- Happy primes up to 43
- Harmonic primes up to 43
- Isolated primes up to 43
- Kynea primes up to 43
- Left-truncatable primes up to 43
- Leyland primes up to 43
- Long primes up to 43
- Lucas primes up to 43
- Lucky primes up to 43
- Mersenne primes up to 43
- Mills primes up to 43
- Multiplicative primes up to 43
- Palindromic primes up to 43
- Pierpont primes up to 43
- Pierpont primes of the 2nd kind up to 43
- Primes up to 43
- Prime quadruplets up to 43
- Prime quintuplet 1s up to 43
- Prime quintuplet 2s up to 43
- Prime sextuplets up to 43
- Prime triplets up to 43
- Proth primes up to 43
- Pythagorean primes up to 43
- Quartan primes up to 43
- Restricted left-truncatable primes up to 43
- Restricted right-truncatable primes up to 43
- Right-truncatable primes up to 43
- Safe primes up to 43
- Semiprimes up to 43
- Sexy primes up to 43
- Sexy prime quadrupletss up to 43
- Sexy prime triplets up to 43
- Solinas primes up to 43
- Sophie germain primes up to 43
- Super primes up to 43
- Thabit primes up to 43
- Thabit primes of the 2nd kind up to 43
- Twin primes up to 43
- Two-sided primes up to 43
- Ulam primes up to 43
- Wagstaff primes up to 43
- Weakly primes up to 43
- Wedderburn-etherington primes up to 43
- Wilson primes up to 43
- Woodall primes up to 43

## First 43#

- First 43 additive primes
- First 43 bell primes
- First 43 carol primes
- First 43 centered decagonal primes
- First 43 centered heptagonal primes
- First 43 centered square primes
- First 43 centered triangular primes
- First 43 chen primes
- First 43 class 1+ primes
- First 43 cousin primes
- First 43 Cuban primes 1
- First 43 Cuban primes 2
- First 43 cullen primes
- First 43 dihedral primes
- First 43 double mersenne primes
- First 43 Emirps
- First 43 euclid primes
- First 43 factorial primes
- First 43 fermat primes
- First 43 fibonacci primes
- First 43 genocchi primes
- First 43 good primes
- First 43 happy primes
- First 43 harmonic primes
- First 43 isolated primes
- First 43 kynea primes
- First 43 left-truncatable primes
- First 43 leyland primes
- First 43 long primes
- First 43 lucas primes
- First 43 lucky primes
- First 43 mersenne primes
- First 43 mills primes
- First 43 multiplicative primes
- First 43 palindromic primes
- First 43 pierpont primes
- First 43 Pierpont primes of the 2nd kind
- First 43 primes
- First 43 prime quadruplets
- First 43 prime quintuplet 1s
- First 43 prime quintuplet 2s
- First 43 prime sextuplets
- First 43 prime triplets
- First 43 proth primes
- First 43 pythagorean primes
- First 43 quartan primes
- First 43 restricted left-truncatable primes
- First 43 restricted right-truncatable primes
- First 43 right-truncatable primes
- First 43 safe primes
- First 43 semiprimes
- First 43 sexy primes
- First 43 sexy prime quadrupletss
- First 43 sexy prime triplets
- First 43 solinas primes
- First 43 sophie germain primes
- First 43 super primes
- First 43 thabit primes
- First 43 Thabit primes of the 2nd kind
- First 43 twin primes
- First 43 two-sided primes
- First 43 ulam primes
- First 43 wagstaff primes
- First 43 weakly primes
- First 43 wedderburn-etherington primes
- First 43 wilson primes
- First 43 woodall primes