Compare 211 vs 661
| Property | 211 | 661 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 2111 | 6611 |
| Prime factorization | 211 | 661 |
| Divisors count | 2 | 2 |
| Divisors | 1, 211 | 1, 661 |
| Number of properties | 8 | 5 |
| Additive primes | 65th | |
| Centered decagonal primes | 6th | 8th |
| Chen primes | 37th | |
| Euclid primes | 5th | |
| Isolated primes | 18th | |
| Lucky primes | 14th | |
| Multiplicative primes | 12th | |
| Primes | 47th | 121st |
| Pythagorean primes | 57th | |
| Super primes | 15th | |
| Twin primes (2nd member) | 30th | |
| Roman numberals | CCXI | DCLXI |
| Base 2 | 110100112 | 10100101012 |
| Base 3 | 212113 | 2201113 |
| Base 4 | 31034 | 221114 |
| Base 5 | 13215 | 101215 |
| Base 6 | 5516 | 30216 |
| Base 7 | 4217 | 16337 |
| Base 8 | 3238 | 12258 |
| Base 9 | 2549 | 8149 |
| Base 10 | 21110 | 66110 |
| Base 11 | 18211 | 55111 |
| Base 12 | 15712 | 47112 |
| Base 13 | 13313 | 3bb13 |
| Base 14 | 11114 | 35314 |
| Base 15 | e115 | 2e115 |
| Base 16 | d316 | 29516 |