Compare 215 vs 218
| Property | 215 | 218 |
|---|---|---|
| Type | semiprime | semiprime |
| Unique factors | 2 | 2 |
| Total factors | 2 | 2 |
| Prime factorization | 51 × 431 | 21 × 1091 |
| Prime factorization | 5 × 43 | 2 × 109 |
| Divisors count | 4 | 4 |
| Divisors | 1, 5, 43, 215 | 1, 2, 109, 218 |
| Number of properties | 1 | 1 |
| Semiprimes | 71st | 73rd |
| Roman numberals | CCXV | CCXVIII |
| Base 2 | 110101112 | 110110102 |
| Base 3 | 212223 | 220023 |
| Base 4 | 31134 | 31224 |
| Base 5 | 13305 | 13335 |
| Base 6 | 5556 | 10026 |
| Base 7 | 4257 | 4317 |
| Base 8 | 3278 | 3328 |
| Base 9 | 2589 | 2629 |
| Base 10 | 21510 | 21810 |
| Base 11 | 18611 | 18911 |
| Base 12 | 15b12 | 16212 |
| Base 13 | 13713 | 13a13 |
| Base 14 | 11514 | 11814 |
| Base 15 | e515 | e815 |
| Base 16 | d716 | da16 |