Compare 213 vs 221
| Property | 213 | 221 |
|---|---|---|
| Type | semiprime | semiprime |
| Unique factors | 2 | 2 |
| Total factors | 2 | 2 |
| Prime factorization | 31 × 711 | 131 × 171 |
| Prime factorization | 3 × 71 | 13 × 17 |
| Divisors count | 4 | 4 |
| Divisors | 1, 3, 71, 213 | 1, 13, 17, 221 |
| Number of properties | 1 | 1 |
| Semiprimes | 69th | 75th |
| Roman numberals | CCXIII | CCXXI |
| Base 2 | 110101012 | 110111012 |
| Base 3 | 212203 | 220123 |
| Base 4 | 31114 | 31314 |
| Base 5 | 13235 | 13415 |
| Base 6 | 5536 | 10056 |
| Base 7 | 4237 | 4347 |
| Base 8 | 3258 | 3358 |
| Base 9 | 2569 | 2659 |
| Base 10 | 21310 | 22110 |
| Base 11 | 18411 | 19111 |
| Base 12 | 15912 | 16512 |
| Base 13 | 13513 | 14013 |
| Base 14 | 11314 | 11b14 |
| Base 15 | e315 | eb15 |
| Base 16 | d516 | dd16 |