Compare 21851 vs 21991
| Property | 21851 | 21991 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 218511 | 219911 |
| Prime factorization | 21851 | 21991 |
| Divisors count | 2 | 2 |
| Divisors | 1, 21851 | 1, 21991 |
| Number of properties | 4 | 5 |
| Additive primes | 1134th | |
| Chen primes | 1208th | |
| Isolated primes | 1708th | 1720th |
| Long primes | 927th | |
| Primes | 2451st | 2463rd |
| Sexy primes (1st member) | 742nd | |
| Sexy prime triplets (1st member) | 202nd | |
| Roman numberals | ||
| Base 2 | 1010101010110112 | 1010101111001112 |
| Base 3 | 10022220223 | 10100111113 |
| Base 4 | 111111234 | 111132134 |
| Base 5 | 11444015 | 12004315 |
| Base 6 | 2450556 | 2454516 |
| Base 7 | 1204647 | 1210547 |
| Base 8 | 525338 | 527478 |
| Base 9 | 328689 | 331449 |
| Base 10 | 2185110 | 2199110 |
| Base 11 | 1546511 | 1558211 |
| Base 12 | 1078b12 | 1088712 |
| Base 13 | 9c3b13 | a01813 |
| Base 14 | 7d6b14 | 802b14 |
| Base 15 | 671b15 | 67b115 |
| Base 16 | 555b16 | 55e716 |