Compare 331 vs 491
| Property | 331 | 491 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 3311 | 4911 |
| Prime factorization | 331 | 491 |
| Divisors count | 2 | 2 |
| Divisors | 1, 331 | 1, 491 |
| Number of properties | 10 | 7 |
| Additive primes | 39th | |
| Chen primes | 66th | |
| Cousin primes (2nd member) | 26th | |
| Cuban primes 1 | 7th | |
| Good primes | 24th | |
| Happy primes | 17th | |
| Harmonic primes | 28th | 38th |
| Isolated primes | 28th | 47th |
| Long primes | 34th | |
| Lucky primes | 19th | |
| Primes | 67th | 94th |
| Sexy primes (1st member) | 37th | |
| Sophie germain primes | 25th | |
| Super primes | 19th | |
| Roman numberals | CCCXXXI | CDXCI |
| Base 2 | 1010010112 | 1111010112 |
| Base 3 | 1100213 | 2000123 |
| Base 4 | 110234 | 132234 |
| Base 5 | 23115 | 34315 |
| Base 6 | 13116 | 21356 |
| Base 7 | 6527 | 13017 |
| Base 8 | 5138 | 7538 |
| Base 9 | 4079 | 6059 |
| Base 10 | 33110 | 49110 |
| Base 11 | 28111 | 40711 |
| Base 12 | 23712 | 34b12 |
| Base 13 | 1c613 | 2ba13 |
| Base 14 | 19914 | 27114 |
| Base 15 | 17115 | 22b15 |
| Base 16 | 14b16 | 1eb16 |