Compare 21881 vs 21991
| Property | 21881 | 21991 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 218811 | 219911 |
| Prime factorization | 21881 | 21991 |
| Divisors count | 2 | 2 |
| Divisors | 1, 21881 | 1, 21991 |
| Number of properties | 4 | 5 |
| Chen primes | 1204th | 1208th |
| Isolated primes | 1712th | 1720th |
| Primes | 2455th | 2463rd |
| Pythagorean primes | 1217th | |
| Sexy primes (1st member) | 742nd | |
| Sexy prime triplets (1st member) | 202nd | |
| Roman numberals | ||
| Base 2 | 1010101011110012 | 1010101111001112 |
| Base 3 | 10100001023 | 10100111113 |
| Base 4 | 111113214 | 111132134 |
| Base 5 | 12000115 | 12004315 |
| Base 6 | 2451456 | 2454516 |
| Base 7 | 1205367 | 1210547 |
| Base 8 | 525718 | 527478 |
| Base 9 | 330129 | 331449 |
| Base 10 | 2188110 | 2199110 |
| Base 11 | 1549211 | 1558211 |
| Base 12 | 107b512 | 1088712 |
| Base 13 | 9c6213 | a01813 |
| Base 14 | 7d8d14 | 802b14 |
| Base 15 | 673b15 | 67b115 |
| Base 16 | 557916 | 55e716 |