# Compare 15 vs 19

Property | 15 | 19 |
---|---|---|

Type | semiprime | prime |

Unique factors | 2 | 1 |

Total factors | 2 | 1 |

Prime factorization | 3^{1} × 5^{1} | 19^{1} |

Prime factorization | 3 × 5 | 19 |

Divisors count | 4 | 2 |

Divisors | 1, 3, 5, 15 | 1, 19 |

Number of properties | 1 | 18 |

Centered triangular primes | 1st | |

Chen primes | 8th | |

Cousin primes (1st member) | 4th | |

Cuban primes 1 | 2nd | |

Happy primes | 3rd | |

Long primes | 3rd | |

Pierpont primes | 7th | |

Primes | 8th | |

Prime quadruplets (4th member) | 2nd | |

Prime quintuplet 1s (5th member) | 1st | |

Prime quintuplet 2s (4th member) | 2nd | |

Prime sextuplets (5th member) | 1st | |

Prime triplets (2nd member) | 5th | |

Prime triplets (3rd member) | 4th | |

Semiprimes | 6th | |

Sexy primes (2nd member) | 4th | |

Sexy prime triplets (3rd member) | 2nd | |

Solinas primes | 7th | |

Twin primes (2nd member) | 4th | |

Roman numberals | XV | XIX |

Base 2 | 1111_{2} | 10011_{2} |

Base 3 | 120_{3} | 201_{3} |

Base 4 | 33_{4} | 103_{4} |

Base 5 | 30_{5} | 34_{5} |

Base 6 | 23_{6} | 31_{6} |

Base 7 | 21_{7} | 25_{7} |

Base 8 | 17_{8} | 23_{8} |

Base 9 | 16_{9} | 21_{9} |

Base 10 | 15_{10} | 19_{10} |

Base 11 | 14_{11} | 18_{11} |

Base 12 | 13_{12} | 17_{12} |

Base 13 | 12_{13} | 16_{13} |

Base 14 | 11_{14} | 15_{14} |

Base 15 | 10_{15} | 14_{15} |

Base 16 | f_{16} | 13_{16} |