Compare 43 vs 51
| Property | 43 | 51 |
|---|---|---|
| Type | prime | semiprime |
| Unique factors | 1 | 2 |
| Total factors | 1 | 2 |
| Prime factorization | 431 | 31 × 171 |
| Prime factorization | 43 | 3 × 17 |
| Divisors count | 2 | 4 |
| Divisors | 1, 43 | 1, 3, 17, 51 |
| Number of properties | 12 | 1 |
| Additive primes | 9th | |
| Centered heptagonal primes | 1st | |
| Cousin primes (1st member) | 6th | |
| Left-truncatable primes | 9th | |
| Lucky primes | 6th | |
| Primes | 14th | |
| Prime triplets (2nd member) | 7th | |
| Prime triplets (3rd member) | 6th | |
| Semiprimes | 18th | |
| Sexy primes (2nd member) | 8th | |
| Sexy prime triplets (3rd member) | 5th | |
| Twin primes (2nd member) | 6th | |
| Wagstaff primes | 3rd | |
| Roman numberals | XLIII | LI |
| Base 2 | 1010112 | 1100112 |
| Base 3 | 11213 | 12203 |
| Base 4 | 2234 | 3034 |
| Base 5 | 1335 | 2015 |
| Base 6 | 1116 | 1236 |
| Base 7 | 617 | 1027 |
| Base 8 | 538 | 638 |
| Base 9 | 479 | 569 |
| Base 10 | 4310 | 5110 |
| Base 11 | 3a11 | 4711 |
| Base 12 | 3712 | 4312 |
| Base 13 | 3413 | 3c13 |
| Base 14 | 3114 | 3914 |
| Base 15 | 2d15 | 3615 |
| Base 16 | 2b16 | 3316 |