Compare 21557 vs 21558
| Property | 21557 | 21558 |
|---|---|---|
| Type | prime | composite number |
| Unique factors | 1 | 3 |
| Total factors | 1 | 3 |
| Prime factorization | 215571 | 21 × 31 × 35931 |
| Prime factorization | 21557 | 2 × 3 × 3593 |
| Divisors count | 2 | 8 |
| Divisors | 1, 21557 | 1, 2, 3, 6, 3593, 7186, 10779, 21558 |
| Number of properties | 8 | 0 |
| Chen primes | 1186th | |
| Good primes | 273rd | |
| Primes | 2418th | |
| Prime triplets (1st member) | 184th | |
| Pythagorean primes | 1199th | |
| Sexy primes (1st member) | 736th | |
| Sexy prime triplets (1st member) | 201st | |
| Twin primes (1st member) | 366th | |
| Roman numberals | ||
| Base 2 | 1010100001101012 | 1010100001101102 |
| Base 3 | 10021201023 | 10021201103 |
| Base 4 | 111003114 | 111003124 |
| Base 5 | 11422125 | 11422135 |
| Base 6 | 2434456 | 2434506 |
| Base 7 | 1165647 | 1165657 |
| Base 8 | 520658 | 520668 |
| Base 9 | 325129 | 325139 |
| Base 10 | 2155710 | 2155810 |
| Base 11 | 1521811 | 1521911 |
| Base 12 | 1058512 | 1058612 |
| Base 13 | 9a7313 | 9a7413 |
| Base 14 | 7bdb14 | 7bdc14 |
| Base 15 | 65c215 | 65c315 |
| Base 16 | 543516 | 543616 |