Compare 21211 vs 21215
| Property | 21211 | 21215 |
|---|---|---|
| Type | prime | semiprime |
| Unique factors | 1 | 2 |
| Total factors | 1 | 2 |
| Prime factorization | 212111 | 51 × 42431 |
| Prime factorization | 21211 | 5 × 4243 |
| Divisors count | 2 | 4 |
| Divisors | 1, 21211 | 1, 5, 4243, 21215 |
| Number of properties | 5 | 1 |
| Additive primes | 1108th | |
| Isolated primes | 1664th | |
| Long primes | 906th | |
| Lucky primes | 388th | |
| Primes | 2385th | |
| Semiprimes | 5376th | |
| Roman numberals | ||
| Base 2 | 1010010110110112 | 1010010110111112 |
| Base 3 | 10020021213 | 10020022023 |
| Base 4 | 110231234 | 110231334 |
| Base 5 | 11343215 | 11343305 |
| Base 6 | 2421116 | 2421156 |
| Base 7 | 1155617 | 1155657 |
| Base 8 | 513338 | 513378 |
| Base 9 | 320779 | 320829 |
| Base 10 | 2121110 | 2121510 |
| Base 11 | 14a3311 | 14a3711 |
| Base 12 | 1033712 | 1033b12 |
| Base 13 | 986813 | 986c13 |
| Base 14 | 7a3114 | 7a3514 |
| Base 15 | 644115 | 644515 |
| Base 16 | 52db16 | 52df16 |