Compare 21391 vs 21557
| Property | 21391 | 21557 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 213911 | 215571 |
| Prime factorization | 21391 | 21557 |
| Divisors count | 2 | 2 |
| Divisors | 1, 21391 | 1, 21557 |
| Number of properties | 3 | 8 |
| Chen primes | 1186th | |
| Good primes | 273rd | |
| Isolated primes | 1676th | |
| Primes | 2401st | 2418th |
| Prime triplets (1st member) | 184th | |
| Pythagorean primes | 1199th | |
| Sexy primes (1st member) | 729th | 736th |
| Sexy prime triplets (1st member) | 201st | |
| Twin primes (1st member) | 366th | |
| Roman numberals | ||
| Base 2 | 1010011100011112 | 1010100001101012 |
| Base 3 | 10021000213 | 10021201023 |
| Base 4 | 110320334 | 111003114 |
| Base 5 | 11410315 | 11422125 |
| Base 6 | 2430116 | 2434456 |
| Base 7 | 1162367 | 1165647 |
| Base 8 | 516178 | 520658 |
| Base 9 | 323079 | 325129 |
| Base 10 | 2139110 | 2155710 |
| Base 11 | 1508711 | 1521811 |
| Base 12 | 1046712 | 1058512 |
| Base 13 | 997613 | 9a7313 |
| Base 14 | 7b1d14 | 7bdb14 |
| Base 15 | 651115 | 65c215 |
| Base 16 | 538f16 | 543516 |