Compare 31 vs 51
Property | 31 | 51 |
---|---|---|
Type | prime | semiprime |
Unique factors | 1 | 2 |
Total factors | 1 | 2 |
Prime factorization | 311 | 31 × 171 |
Prime factorization | 31 | 3 × 17 |
Divisors count | 2 | 4 |
Divisors | 1, 31 | 1, 3, 17, 51 |
Number of properties | 18 | 1 |
Centered decagonal primes | 2nd | |
Centered triangular primes | 2nd | |
Chen primes | 11th | |
Class 1+ primes | 8th | |
Emirps | 3rd | |
Euclid primes | 4th | |
Happy primes | 5th | |
Lucky primes | 4th | |
Mersenne primes | 3rd | |
Multiplicative primes | 7th | |
Pierpont primes of the 2nd kind | 8th | |
Primes | 11th | |
Right-truncatable primes | 7th | |
Semiprimes | 18th | |
Sexy primes (1st member) | 7th | |
Sexy prime triplets (1st member) | 5th | |
Solinas primes | 10th | |
Super primes | 5th | |
Twin primes (2nd member) | 5th | |
Roman numberals | XXXI | LI |
Base 2 | 111112 | 1100112 |
Base 3 | 10113 | 12203 |
Base 4 | 1334 | 3034 |
Base 5 | 1115 | 2015 |
Base 6 | 516 | 1236 |
Base 7 | 437 | 1027 |
Base 8 | 378 | 638 |
Base 9 | 349 | 569 |
Base 10 | 3110 | 5110 |
Base 11 | 2911 | 4711 |
Base 12 | 2712 | 4312 |
Base 13 | 2513 | 3c13 |
Base 14 | 2314 | 3914 |
Base 15 | 2115 | 3615 |
Base 16 | 1f16 | 3316 |