Compare 180 vs 191
| Property | 180 | 191 |
|---|---|---|
| Type | composite number | prime |
| Unique factors | 3 | 1 |
| Total factors | 5 | 1 |
| Prime factorization | 22 × 32 × 51 | 1911 |
| Prime factorization | 2 × 2 × 3 × 3 × 5 | 191 |
| Divisors count | 18 | 2 |
| Divisors | 1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 90, 180 | 1, 191 |
| Number of properties | 0 | 16 |
| Additive primes | 24th | |
| Chen primes | 34th | |
| Class 1+ primes | 14th | |
| Good primes | 16th | |
| Harmonic primes | 15th | |
| Palindromic primes | 10th | |
| Pierpont primes of the 2nd kind | 14th | |
| Primes | 43rd | |
| Prime quadruplets (1st member) | 4th | |
| Prime triplets (1st member) | 13th | |
| Sexy primes (1st member) | 25th | |
| Solinas primes | 25th | |
| Sophie germain primes | 15th | |
| Super primes | 14th | |
| Thabit primes | 6th | |
| Twin primes (1st member) | 14th | |
| Roman numberals | CLXXX | CXCI |
| Base 2 | 101101002 | 101111112 |
| Base 3 | 202003 | 210023 |
| Base 4 | 23104 | 23334 |
| Base 5 | 12105 | 12315 |
| Base 6 | 5006 | 5156 |
| Base 7 | 3457 | 3627 |
| Base 8 | 2648 | 2778 |
| Base 9 | 2209 | 2329 |
| Base 10 | 18010 | 19110 |
| Base 11 | 15411 | 16411 |
| Base 12 | 13012 | 13b12 |
| Base 13 | 10b13 | 11913 |
| Base 14 | cc14 | d914 |
| Base 15 | c015 | cb15 |
| Base 16 | b416 | bf16 |