Compare 4 vs 31
Property | 4 | 31 |
---|---|---|
Type | semiprime | prime |
Unique factors | 1 | 1 |
Total factors | 2 | 1 |
Prime factorization | 22 | 311 |
Prime factorization | 2 × 2 | 31 |
Divisors count | 3 | 2 |
Divisors | 1, 2, 4 | 1, 31 |
Number of properties | 1 | 18 |
Centered decagonal primes | 2nd | |
Centered triangular primes | 2nd | |
Chen primes | 11th | |
Class 1+ primes | 8th | |
Emirps | 3rd | |
Euclid primes | 4th | |
Happy primes | 5th | |
Lucky primes | 4th | |
Mersenne primes | 3rd | |
Multiplicative primes | 7th | |
Pierpont primes of the 2nd kind | 8th | |
Primes | 11th | |
Right-truncatable primes | 7th | |
Semiprimes | 1st | |
Sexy primes (1st member) | 7th | |
Sexy prime triplets (1st member) | 5th | |
Solinas primes | 10th | |
Super primes | 5th | |
Twin primes (2nd member) | 5th | |
Roman numberals | IV | XXXI |
Base 2 | 1002 | 111112 |
Base 3 | 113 | 10113 |
Base 4 | 104 | 1334 |
Base 5 | 45 | 1115 |
Base 6 | 46 | 516 |
Base 7 | 47 | 437 |
Base 8 | 48 | 378 |
Base 9 | 49 | 349 |
Base 10 | 410 | 3110 |
Base 11 | 411 | 2911 |
Base 12 | 412 | 2712 |
Base 13 | 413 | 2513 |
Base 14 | 414 | 2314 |
Base 15 | 415 | 2115 |
Base 16 | 416 | 1f16 |