Compare 621 vs 631
| Property | 621 | 631 |
|---|---|---|
| Type | composite number | prime |
| Unique factors | 2 | 1 |
| Total factors | 4 | 1 |
| Prime factorization | 33 × 231 | 6311 |
| Prime factorization | 3 × 3 × 3 × 23 | 631 |
| Divisors count | 8 | 2 |
| Divisors | 1, 3, 9, 23, 27, 69, 207, 621 | 1, 631 |
| Number of properties | 0 | 6 |
| Centered triangular primes | 7th | |
| Chen primes | 80th | |
| Cuban primes 1 | 10th | |
| Isolated primes | 60th | |
| Lucky primes | 32nd | |
| Primes | 115th | |
| Roman numberals | DCXXI | DCXXXI |
| Base 2 | 10011011012 | 10011101112 |
| Base 3 | 2120003 | 2121013 |
| Base 4 | 212314 | 213134 |
| Base 5 | 44415 | 100115 |
| Base 6 | 25136 | 25316 |
| Base 7 | 15457 | 15617 |
| Base 8 | 11558 | 11678 |
| Base 9 | 7609 | 7719 |
| Base 10 | 62110 | 63110 |
| Base 11 | 51511 | 52411 |
| Base 12 | 43912 | 44712 |
| Base 13 | 38a13 | 39713 |
| Base 14 | 32514 | 33114 |
| Base 15 | 2b615 | 2c115 |
| Base 16 | 26d16 | 27716 |