Compare 21557 vs 21661
| Property | 21557 | 21661 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 215571 | 216611 |
| Prime factorization | 21557 | 21661 |
| Divisors count | 2 | 2 |
| Divisors | 1, 21557 | 1, 21661 |
| Number of properties | 8 | 4 |
| Chen primes | 1186th | |
| Good primes | 273rd | |
| Harmonic primes | 894th | |
| Isolated primes | 1693rd | |
| Primes | 2418th | 2432nd |
| Prime triplets (1st member) | 184th | |
| Pythagorean primes | 1199th | 1207th |
| Sexy primes (1st member) | 736th | |
| Sexy prime triplets (1st member) | 201st | |
| Twin primes (1st member) | 366th | |
| Roman numberals | ||
| Base 2 | 1010100001101012 | 1010100100111012 |
| Base 3 | 10021201023 | 10022010213 |
| Base 4 | 111003114 | 111021314 |
| Base 5 | 11422125 | 11431215 |
| Base 6 | 2434456 | 2441416 |
| Base 7 | 1165647 | 1201037 |
| Base 8 | 520658 | 522358 |
| Base 9 | 325129 | 326379 |
| Base 10 | 2155710 | 2166110 |
| Base 11 | 1521811 | 1530211 |
| Base 12 | 1058512 | 1065112 |
| Base 13 | 9a7313 | 9b2313 |
| Base 14 | 7bdb14 | 7c7314 |
| Base 15 | 65c215 | 664115 |
| Base 16 | 543516 | 549d16 |