Compare 21991 vs 22091
| Property | 21991 | 22091 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 219911 | 220911 |
| Prime factorization | 21991 | 22091 |
| Divisors count | 2 | 2 |
| Divisors | 1, 21991 | 1, 22091 |
| Number of properties | 5 | 4 |
| Chen primes | 1208th | 1215th |
| Harmonic primes | 911th | |
| Isolated primes | 1720th | |
| Primes | 2463rd | 2476th |
| Sexy primes (1st member) | 742nd | |
| Sexy prime triplets (1st member) | 202nd | |
| Twin primes (1st member) | 374th | |
| Roman numberals | ||
| Base 2 | 1010101111001112 | 1010110010010112 |
| Base 3 | 10100111113 | 10100220123 |
| Base 4 | 111132134 | 111210234 |
| Base 5 | 12004315 | 12013315 |
| Base 6 | 2454516 | 2501356 |
| Base 7 | 1210547 | 1212567 |
| Base 8 | 527478 | 531138 |
| Base 9 | 331449 | 332659 |
| Base 10 | 2199110 | 2209110 |
| Base 11 | 1558211 | 1566311 |
| Base 12 | 1088712 | 1094b12 |
| Base 13 | a01813 | a09413 |
| Base 14 | 802b14 | 809d14 |
| Base 15 | 67b115 | 682b15 |
| Base 16 | 55e716 | 564b16 |