Compare 21997 vs 22006
| Property | 21997 | 22006 |
|---|---|---|
| Type | prime | semiprime |
| Unique factors | 1 | 2 |
| Total factors | 1 | 2 |
| Prime factorization | 219971 | 21 × 110031 |
| Prime factorization | 21997 | 2 × 11003 |
| Divisors count | 2 | 4 |
| Divisors | 1, 21997 | 1, 2, 11003, 22006 |
| Number of properties | 8 | 1 |
| Chen primes | 1209th | |
| Isolated primes | 1721st | |
| Left-truncatable primes | 173rd | |
| Primes | 2464th | |
| Pythagorean primes | 1223rd | |
| Semiprimes | 5555th | |
| Sexy primes (1st member) | 743rd | |
| Sexy primes (2nd member) | 742nd | |
| Sexy prime triplets (2nd member) | 202nd | |
| Roman numberals | ||
| Base 2 | 1010101111011012 | 1010101111101102 |
| Base 3 | 10100112013 | 10100120013 |
| Base 4 | 111132314 | 111133124 |
| Base 5 | 12004425 | 12010115 |
| Base 6 | 2455016 | 2455146 |
| Base 7 | 1210637 | 1211057 |
| Base 8 | 527558 | 527668 |
| Base 9 | 331519 | 331619 |
| Base 10 | 2199710 | 2200610 |
| Base 11 | 1558811 | 1559611 |
| Base 12 | 1089112 | 1089a12 |
| Base 13 | a02113 | a02a13 |
| Base 14 | 803314 | 803c14 |
| Base 15 | 67b715 | 67c115 |
| Base 16 | 55ed16 | 55f616 |