Compare 21517 vs 21991
| Property | 21517 | 21991 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 215171 | 219911 |
| Prime factorization | 21517 | 21991 |
| Divisors count | 2 | 2 |
| Divisors | 1, 21517 | 1, 21991 |
| Number of properties | 7 | 5 |
| Chen primes | 1208th | |
| Cousin primes (1st member) | 368th | |
| Isolated primes | 1687th | 1720th |
| Primes | 2414th | 2463rd |
| Prime triplets (1st member) | 183rd | |
| Pythagorean primes | 1196th | |
| Sexy primes (1st member) | 734th | 742nd |
| Sexy prime triplets (1st member) | 200th | 202nd |
| Roman numberals | ||
| Base 2 | 1010100000011012 | 1010101111001112 |
| Base 3 | 10021112213 | 10100111113 |
| Base 4 | 111000314 | 111132134 |
| Base 5 | 11420325 | 12004315 |
| Base 6 | 2433416 | 2454516 |
| Base 7 | 1165067 | 1210547 |
| Base 8 | 520158 | 527478 |
| Base 9 | 324579 | 331449 |
| Base 10 | 2151710 | 2199110 |
| Base 11 | 1519111 | 1558211 |
| Base 12 | 1055112 | 1088712 |
| Base 13 | 9a4213 | a01813 |
| Base 14 | 7bad14 | 802b14 |
| Base 15 | 659715 | 67b115 |
| Base 16 | 540d16 | 55e716 |