Compare 221 vs 231
| Property | 221 | 231 |
|---|---|---|
| Type | semiprime | composite number |
| Unique factors | 2 | 3 |
| Total factors | 2 | 3 |
| Prime factorization | 131 × 171 | 31 × 71 × 111 |
| Prime factorization | 13 × 17 | 3 × 7 × 11 |
| Divisors count | 4 | 8 |
| Divisors | 1, 13, 17, 221 | 1, 3, 7, 11, 21, 33, 77, 231 |
| Number of properties | 1 | 0 |
| Semiprimes | 75th | |
| Roman numberals | CCXXI | CCXXXI |
| Base 2 | 110111012 | 111001112 |
| Base 3 | 220123 | 221203 |
| Base 4 | 31314 | 32134 |
| Base 5 | 13415 | 14115 |
| Base 6 | 10056 | 10236 |
| Base 7 | 4347 | 4507 |
| Base 8 | 3358 | 3478 |
| Base 9 | 2659 | 2769 |
| Base 10 | 22110 | 23110 |
| Base 11 | 19111 | 1a011 |
| Base 12 | 16512 | 17312 |
| Base 13 | 14013 | 14a13 |
| Base 14 | 11b14 | 12714 |
| Base 15 | eb15 | 10615 |
| Base 16 | dd16 | e716 |