Compare 21155 vs 21163
| Property | 21155 | 21163 |
|---|---|---|
| Type | semiprime | prime |
| Unique factors | 2 | 1 |
| Total factors | 2 | 1 |
| Prime factorization | 51 × 42311 | 211631 |
| Prime factorization | 5 × 4231 | 21163 |
| Divisors count | 4 | 2 |
| Divisors | 1, 5, 4231, 21155 | 1, 21163 |
| Number of properties | 1 | 6 |
| Additive primes | 1105th | |
| Isolated primes | 1660th | |
| Primes | 2379th | |
| Semiprimes | 5363rd | |
| Sexy primes (1st member) | 721st | |
| Sexy primes (2nd member) | 720th | |
| Sexy prime triplets (2nd member) | 197th | |
| Roman numberals | ||
| Base 2 | 1010010101000112 | 1010010101010112 |
| Base 3 | 10020001123 | 10020002113 |
| Base 4 | 110222034 | 110222234 |
| Base 5 | 11341105 | 11341235 |
| Base 6 | 2415356 | 2415516 |
| Base 7 | 1154517 | 1154627 |
| Base 8 | 512438 | 512538 |
| Base 9 | 320159 | 320249 |
| Base 10 | 2115510 | 2116310 |
| Base 11 | 1499211 | 1499a11 |
| Base 12 | 102ab12 | 102b712 |
| Base 13 | 982413 | 982c13 |
| Base 14 | 79d114 | 79d914 |
| Base 15 | 640515 | 640d15 |
| Base 16 | 52a316 | 52ab16 |