Compare 40 vs 53
| Property | 40 | 53 |
|---|---|---|
| Type | composite number | prime |
| Unique factors | 2 | 1 |
| Total factors | 4 | 1 |
| Prime factorization | 23 × 51 | 531 |
| Prime factorization | 2 × 2 × 2 × 5 | 53 |
| Divisors count | 8 | 2 |
| Divisors | 1, 2, 4, 5, 8, 10, 20, 40 | 1, 53 |
| Number of properties | 0 | 18 |
| Chen primes | 15th | |
| Class 1+ primes | 10th | |
| Good primes | 7th | |
| Isolated primes | 5th | |
| Left-truncatable primes | 11th | |
| Pierpont primes of the 2nd kind | 10th | |
| Primes | 16th | |
| Pythagorean primes | 7th | |
| Restricted right-truncatable primes | 1st | |
| Right-truncatable primes | 9th | |
| Sexy primes (1st member) | 11th | |
| Sexy primes (2nd member) | 10th | |
| Sexy prime quadrupletss (3rd member) | 3rd | |
| Sexy prime triplets (2nd member) | 7th | |
| Sexy prime triplets (3rd member) | 6th | |
| Sophie germain primes | 8th | |
| Two-sided primes | 7th | |
| Ulam primes | 6th | |
| Roman numberals | XL | LIII |
| Base 2 | 1010002 | 1101012 |
| Base 3 | 11113 | 12223 |
| Base 4 | 2204 | 3114 |
| Base 5 | 1305 | 2035 |
| Base 6 | 1046 | 1256 |
| Base 7 | 557 | 1047 |
| Base 8 | 508 | 658 |
| Base 9 | 449 | 589 |
| Base 10 | 4010 | 5310 |
| Base 11 | 3711 | 4911 |
| Base 12 | 3412 | 4512 |
| Base 13 | 3113 | 4113 |
| Base 14 | 2c14 | 3b14 |
| Base 15 | 2a15 | 3815 |
| Base 16 | 2816 | 3516 |