Compare 21871 vs 21997
| Property | 21871 | 21997 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 218711 | 219971 |
| Prime factorization | 21871 | 21997 |
| Divisors count | 2 | 2 |
| Divisors | 1, 21871 | 1, 21997 |
| Number of properties | 3 | 8 |
| Additive primes | 1135th | |
| Chen primes | 1209th | |
| Isolated primes | 1711th | 1721st |
| Left-truncatable primes | 173rd | |
| Primes | 2454th | 2464th |
| Pythagorean primes | 1223rd | |
| Sexy primes (1st member) | 743rd | |
| Sexy primes (2nd member) | 742nd | |
| Sexy prime triplets (2nd member) | 202nd | |
| Roman numberals | ||
| Base 2 | 1010101011011112 | 1010101111011012 |
| Base 3 | 10100000013 | 10100112013 |
| Base 4 | 111112334 | 111132314 |
| Base 5 | 11444415 | 12004425 |
| Base 6 | 2451316 | 2455016 |
| Base 7 | 1205237 | 1210637 |
| Base 8 | 525578 | 527558 |
| Base 9 | 330019 | 331519 |
| Base 10 | 2187110 | 2199710 |
| Base 11 | 1548311 | 1558811 |
| Base 12 | 107a712 | 1089112 |
| Base 13 | 9c5513 | a02113 |
| Base 14 | 7d8314 | 803314 |
| Base 15 | 673115 | 67b715 |
| Base 16 | 556f16 | 55ed16 |