Compare 245 vs 253
| Property | 245 | 253 |
|---|---|---|
| Type | composite number | semiprime |
| Unique factors | 2 | 2 |
| Total factors | 3 | 2 |
| Prime factorization | 51 × 72 | 111 × 231 |
| Prime factorization | 5 × 7 × 7 | 11 × 23 |
| Divisors count | 6 | 4 |
| Divisors | 1, 5, 7, 35, 49, 245 | 1, 11, 23, 253 |
| Number of properties | 0 | 1 |
| Semiprimes | 81st | |
| Roman numberals | CCXLV | CCLIII |
| Base 2 | 111101012 | 111111012 |
| Base 3 | 1000023 | 1001013 |
| Base 4 | 33114 | 33314 |
| Base 5 | 14405 | 20035 |
| Base 6 | 10456 | 11016 |
| Base 7 | 5007 | 5117 |
| Base 8 | 3658 | 3758 |
| Base 9 | 3029 | 3119 |
| Base 10 | 24510 | 25310 |
| Base 11 | 20311 | 21011 |
| Base 12 | 18512 | 19112 |
| Base 13 | 15b13 | 16613 |
| Base 14 | 13714 | 14114 |
| Base 15 | 11515 | 11d15 |
| Base 16 | f516 | fd16 |