Compare 541 vs 661
| Property | 541 | 661 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 5411 | 6611 |
| Prime factorization | 541 | 661 |
| Divisors count | 2 | 2 |
| Divisors | 1, 541 | 1, 661 |
| Number of properties | 9 | 5 |
| Additive primes | 65th | |
| Centered decagonal primes | 8th | |
| Chen primes | 71st | |
| Good primes | 28th | |
| Harmonic primes | 41st | |
| Isolated primes | 51st | |
| Long primes | 38th | |
| Lucky primes | 27th | |
| Primes | 100th | 121st |
| Pythagorean primes | 47th | 57th |
| Sexy primes (1st member) | 48th | |
| Twin primes (2nd member) | 30th | |
| Roman numberals | DXLI | DCLXI |
| Base 2 | 10000111012 | 10100101012 |
| Base 3 | 2020013 | 2201113 |
| Base 4 | 201314 | 221114 |
| Base 5 | 41315 | 101215 |
| Base 6 | 23016 | 30216 |
| Base 7 | 14027 | 16337 |
| Base 8 | 10358 | 12258 |
| Base 9 | 6619 | 8149 |
| Base 10 | 54110 | 66110 |
| Base 11 | 45211 | 55111 |
| Base 12 | 39112 | 47112 |
| Base 13 | 32813 | 3bb13 |
| Base 14 | 2a914 | 35314 |
| Base 15 | 26115 | 2e115 |
| Base 16 | 21d16 | 29516 |