Compare 21961 vs 21991
| Property | 21961 | 21991 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 219611 | 219911 |
| Prime factorization | 21961 | 21991 |
| Divisors count | 2 | 2 |
| Divisors | 1, 21961 | 1, 21991 |
| Number of properties | 5 | 5 |
| Additive primes | 1139th | |
| Chen primes | 1206th | 1208th |
| Isolated primes | 1718th | 1720th |
| Primes | 2461st | 2463rd |
| Pythagorean primes | 1221st | |
| Sexy primes (1st member) | 742nd | |
| Sexy prime triplets (1st member) | 202nd | |
| Roman numberals | ||
| Base 2 | 1010101110010012 | 1010101111001112 |
| Base 3 | 10100101013 | 10100111113 |
| Base 4 | 111130214 | 111132134 |
| Base 5 | 12003215 | 12004315 |
| Base 6 | 2454016 | 2454516 |
| Base 7 | 1210127 | 1210547 |
| Base 8 | 527118 | 527478 |
| Base 9 | 331119 | 331449 |
| Base 10 | 2196110 | 2199110 |
| Base 11 | 1555511 | 1558211 |
| Base 12 | 1086112 | 1088712 |
| Base 13 | 9cc413 | a01813 |
| Base 14 | 800914 | 802b14 |
| Base 15 | 679115 | 67b115 |
| Base 16 | 55c916 | 55e716 |