Compare 331 vs 421
| Property | 331 | 421 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 3311 | 4211 |
| Prime factorization | 331 | 421 |
| Divisors count | 2 | 2 |
| Divisors | 1, 331 | 1, 421 |
| Number of properties | 10 | 6 |
| Additive primes | 39th | 48th |
| Centered square primes | 8th | |
| Cuban primes 1 | 7th | |
| Good primes | 24th | |
| Happy primes | 17th | |
| Harmonic primes | 28th | |
| Isolated primes | 28th | |
| Lucky primes | 19th | 23rd |
| Primes | 67th | 82nd |
| Pythagorean primes | 40th | |
| Sexy primes (1st member) | 37th | |
| Super primes | 19th | |
| Twin primes (2nd member) | 22nd | |
| Roman numberals | CCCXXXI | CDXXI |
| Base 2 | 1010010112 | 1101001012 |
| Base 3 | 1100213 | 1201213 |
| Base 4 | 110234 | 122114 |
| Base 5 | 23115 | 31415 |
| Base 6 | 13116 | 15416 |
| Base 7 | 6527 | 11417 |
| Base 8 | 5138 | 6458 |
| Base 9 | 4079 | 5179 |
| Base 10 | 33110 | 42110 |
| Base 11 | 28111 | 35311 |
| Base 12 | 23712 | 2b112 |
| Base 13 | 1c613 | 26513 |
| Base 14 | 19914 | 22114 |
| Base 15 | 17115 | 1d115 |
| Base 16 | 14b16 | 1a516 |