Compare 521 vs 526
| Property | 521 | 526 |
|---|---|---|
| Type | prime | semiprime |
| Unique factors | 1 | 2 |
| Total factors | 1 | 2 |
| Prime factorization | 5211 | 21 × 2631 |
| Prime factorization | 521 | 2 × 263 |
| Divisors count | 2 | 4 |
| Divisors | 1, 521 | 1, 2, 263, 526 |
| Number of properties | 6 | 1 |
| Chen primes | 70th | |
| Lucas primes | 8th | |
| Primes | 98th | |
| Pythagorean primes | 46th | |
| Semiprimes | 162nd | |
| Solinas primes | 39th | |
| Twin primes (1st member) | 25th | |
| Roman numberals | DXXI | DXXVI |
| Base 2 | 10000010012 | 10000011102 |
| Base 3 | 2010223 | 2011113 |
| Base 4 | 200214 | 200324 |
| Base 5 | 40415 | 41015 |
| Base 6 | 22256 | 22346 |
| Base 7 | 13437 | 13517 |
| Base 8 | 10118 | 10168 |
| Base 9 | 6389 | 6449 |
| Base 10 | 52110 | 52610 |
| Base 11 | 43411 | 43911 |
| Base 12 | 37512 | 37a12 |
| Base 13 | 31113 | 31613 |
| Base 14 | 29314 | 29814 |
| Base 15 | 24b15 | 25115 |
| Base 16 | 20916 | 20e16 |