Compare 523 vs 531
| Property | 523 | 531 |
|---|---|---|
| Type | prime | composite number |
| Unique factors | 1 | 2 |
| Total factors | 1 | 3 |
| Prime factorization | 5231 | 32 × 591 |
| Prime factorization | 523 | 3 × 3 × 59 |
| Divisors count | 2 | 6 |
| Divisors | 1, 523 | 1, 3, 9, 59, 177, 531 |
| Number of properties | 3 | 0 |
| Left-truncatable primes | 34th | |
| Primes | 99th | |
| Twin primes (2nd member) | 25th | |
| Roman numberals | DXXIII | DXXXI |
| Base 2 | 10000010112 | 10000100112 |
| Base 3 | 2011013 | 2012003 |
| Base 4 | 200234 | 201034 |
| Base 5 | 40435 | 41115 |
| Base 6 | 22316 | 22436 |
| Base 7 | 13457 | 13567 |
| Base 8 | 10138 | 10238 |
| Base 9 | 6419 | 6509 |
| Base 10 | 52310 | 53110 |
| Base 11 | 43611 | 44311 |
| Base 12 | 37712 | 38312 |
| Base 13 | 31313 | 31b13 |
| Base 14 | 29514 | 29d14 |
| Base 15 | 24d15 | 25615 |
| Base 16 | 20b16 | 21316 |