Compare 551221 vs 551231
| Property | 551221 | 551231 |
|---|---|---|
| Type | semiprime | prime |
| Unique factors | 2 | 1 |
| Total factors | 2 | 1 |
| Prime factorization | 111 × 501111 | 5512311 |
| Prime factorization | 11 × 50111 | 551231 |
| Divisors count | 4 | 2 |
| Divisors | 1, 11, 50111, 551221 | 1, 551231 |
| Number of properties | 1 | 5 |
| Additive primes | 17816th | |
| Chen primes | 17930th | |
| Primes | 45419th | |
| Semiprimes | 118890th | |
| Sophie germain primes | 4686th | |
| Twin primes (1st member) | 4960th | |
| Roman numberals | ||
| Base 2 | 100001101001001101012 | 100001101001001111112 |
| Base 3 | 10010000101213 | 10010000102223 |
| Base 4 | 20122103114 | 20122103334 |
| Base 5 | 1201143415 | 1201144115 |
| Base 6 | 154515416 | 154515556 |
| Base 7 | 44540267 | 44540427 |
| Base 8 | 20644658 | 20644778 |
| Base 9 | 10301179 | 10301289 |
| Base 10 | 55122110 | 55123110 |
| Base 11 | 34716011 | 34716a11 |
| Base 12 | 226bb112 | 226bbb12 |
| Base 13 | 163b8813 | 163b9513 |
| Base 14 | 104c4d14 | 104c5914 |
| Base 15 | ad4d115 | ad4db15 |
| Base 16 | 8693516 | 8693f16 |