Compare 180 vs 181
| Property | 180 | 181 |
|---|---|---|
| Type | composite number | prime |
| Unique factors | 3 | 1 |
| Total factors | 5 | 1 |
| Prime factorization | 22 × 32 × 51 | 1811 |
| Prime factorization | 2 × 2 × 3 × 3 × 5 | 181 |
| Divisors count | 18 | 2 |
| Divisors | 1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 90, 180 | 1, 181 |
| Number of properties | 0 | 8 |
| Centered square primes | 6th | |
| Chen primes | 33rd | |
| Dihedral primes | 5th | |
| Long primes | 16th | |
| Palindromic primes | 9th | |
| Primes | 42nd | |
| Pythagorean primes | 19th | |
| Twin primes (2nd member) | 13th | |
| Roman numberals | CLXXX | CLXXXI |
| Base 2 | 101101002 | 101101012 |
| Base 3 | 202003 | 202013 |
| Base 4 | 23104 | 23114 |
| Base 5 | 12105 | 12115 |
| Base 6 | 5006 | 5016 |
| Base 7 | 3457 | 3467 |
| Base 8 | 2648 | 2658 |
| Base 9 | 2209 | 2219 |
| Base 10 | 18010 | 18110 |
| Base 11 | 15411 | 15511 |
| Base 12 | 13012 | 13112 |
| Base 13 | 10b13 | 10c13 |
| Base 14 | cc14 | cd14 |
| Base 15 | c015 | c115 |
| Base 16 | b416 | b516 |