Compare 253 vs 291
| Property | 253 | 291 |
|---|---|---|
| Type | semiprime | semiprime |
| Unique factors | 2 | 2 |
| Total factors | 2 | 2 |
| Prime factorization | 111 × 231 | 31 × 971 |
| Prime factorization | 11 × 23 | 3 × 97 |
| Divisors count | 4 | 4 |
| Divisors | 1, 11, 23, 253 | 1, 3, 97, 291 |
| Number of properties | 1 | 1 |
| Semiprimes | 81st | 91st |
| Roman numberals | CCLIII | CCXCI |
| Base 2 | 111111012 | 1001000112 |
| Base 3 | 1001013 | 1012103 |
| Base 4 | 33314 | 102034 |
| Base 5 | 20035 | 21315 |
| Base 6 | 11016 | 12036 |
| Base 7 | 5117 | 5647 |
| Base 8 | 3758 | 4438 |
| Base 9 | 3119 | 3539 |
| Base 10 | 25310 | 29110 |
| Base 11 | 21011 | 24511 |
| Base 12 | 19112 | 20312 |
| Base 13 | 16613 | 19513 |
| Base 14 | 14114 | 16b14 |
| Base 15 | 11d15 | 14615 |
| Base 16 | fd16 | 12316 |