Compare 521 vs 631
| Property | 521 | 631 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 5211 | 6311 |
| Prime factorization | 521 | 631 |
| Divisors count | 2 | 2 |
| Divisors | 1, 521 | 1, 631 |
| Number of properties | 6 | 6 |
| Centered triangular primes | 7th | |
| Chen primes | 70th | 80th |
| Cuban primes 1 | 10th | |
| Isolated primes | 60th | |
| Lucas primes | 8th | |
| Lucky primes | 32nd | |
| Primes | 98th | 115th |
| Pythagorean primes | 46th | |
| Solinas primes | 39th | |
| Twin primes (1st member) | 25th | |
| Roman numberals | DXXI | DCXXXI |
| Base 2 | 10000010012 | 10011101112 |
| Base 3 | 2010223 | 2121013 |
| Base 4 | 200214 | 213134 |
| Base 5 | 40415 | 100115 |
| Base 6 | 22256 | 25316 |
| Base 7 | 13437 | 15617 |
| Base 8 | 10118 | 11678 |
| Base 9 | 6389 | 7719 |
| Base 10 | 52110 | 63110 |
| Base 11 | 43411 | 52411 |
| Base 12 | 37512 | 44712 |
| Base 13 | 31113 | 39713 |
| Base 14 | 29314 | 33114 |
| Base 15 | 24b15 | 2c115 |
| Base 16 | 20916 | 27716 |