Compare 821 vs 2081
| Property | 821 | 2081 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 8211 | 20811 |
| Prime factorization | 821 | 2081 |
| Divisors count | 2 | 2 |
| Divisors | 1, 821 | 1, 2081 |
| Number of properties | 10 | 10 |
| Additive primes | 75th | 162nd |
| Chen primes | 97th | 192nd |
| Good primes | 40th | |
| Long primes | 50th | |
| Primes | 142nd | 313th |
| Prime quadruplets (1st member) | 5th | 8th |
| Prime triplets (1st member) | 25th | 51st |
| Pythagorean primes | 69th | 152nd |
| Sexy primes (1st member) | 64th | 132nd |
| Solinas primes | 58th | |
| Super primes | 65th | |
| Twin primes (1st member) | 32nd | 63rd |
| Roman numberals | DCCCXXI | MMLXXXI |
| Base 2 | 11001101012 | 1000001000012 |
| Base 3 | 10101023 | 22120023 |
| Base 4 | 303114 | 2002014 |
| Base 5 | 112415 | 313115 |
| Base 6 | 34456 | 133456 |
| Base 7 | 22527 | 60327 |
| Base 8 | 14658 | 40418 |
| Base 9 | 11129 | 27629 |
| Base 10 | 82110 | 208110 |
| Base 11 | 68711 | 162211 |
| Base 12 | 58512 | 125512 |
| Base 13 | 4b213 | c4113 |
| Base 14 | 42914 | a8914 |
| Base 15 | 39b15 | 93b15 |
| Base 16 | 33516 | 82116 |