Compare 21991 vs 22391
| Property | 21991 | 22391 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 219911 | 223911 |
| Prime factorization | 21991 | 22391 |
| Divisors count | 2 | 2 |
| Divisors | 1, 21991 | 1, 22391 |
| Number of properties | 5 | 4 |
| Additive primes | 1154th | |
| Chen primes | 1208th | |
| Isolated primes | 1720th | 1749th |
| Primes | 2463rd | 2506th |
| Sexy primes (1st member) | 742nd | 754th |
| Sexy prime triplets (1st member) | 202nd | |
| Roman numberals | ||
| Base 2 | 1010101111001112 | 1010111011101112 |
| Base 3 | 10100111113 | 10102010223 |
| Base 4 | 111132134 | 111313134 |
| Base 5 | 12004315 | 12040315 |
| Base 6 | 2454516 | 2513556 |
| Base 7 | 1210547 | 1221657 |
| Base 8 | 527478 | 535678 |
| Base 9 | 331449 | 336389 |
| Base 10 | 2199110 | 2239110 |
| Base 11 | 1558211 | 1590611 |
| Base 12 | 1088712 | 10b5b12 |
| Base 13 | a01813 | a26513 |
| Base 14 | 802b14 | 823514 |
| Base 15 | 67b115 | 697b15 |
| Base 16 | 55e716 | 577716 |