Compare 821 vs 1151
| Property | 821 | 1151 |
|---|---|---|
| Type | prime | prime |
| Unique factors | 1 | 1 |
| Total factors | 1 | 1 |
| Prime factorization | 8211 | 11511 |
| Prime factorization | 821 | 1151 |
| Divisors count | 2 | 2 |
| Divisors | 1, 821 | 1, 1151 |
| Number of properties | 10 | 10 |
| Additive primes | 75th | |
| Chen primes | 97th | 126th |
| Class 1+ primes | 20th | |
| Emirps | 47th | |
| Good primes | 40th | 48th |
| Happy primes | 40th | |
| Long primes | 50th | |
| Multiplicative primes | 15th | |
| Pierpont primes of the 2nd kind | 20th | |
| Primes | 142nd | 190th |
| Prime quadruplets (1st member) | 5th | |
| Prime triplets (1st member) | 25th | |
| Pythagorean primes | 69th | |
| Sexy primes (1st member) | 64th | |
| Solinas primes | 51st | |
| Twin primes (1st member) | 32nd | 41st |
| Roman numberals | DCCCXXI | MCLI |
| Base 2 | 11001101012 | 100011111112 |
| Base 3 | 10101023 | 11201223 |
| Base 4 | 303114 | 1013334 |
| Base 5 | 112415 | 141015 |
| Base 6 | 34456 | 51556 |
| Base 7 | 22527 | 32337 |
| Base 8 | 14658 | 21778 |
| Base 9 | 11129 | 15189 |
| Base 10 | 82110 | 115110 |
| Base 11 | 68711 | 95711 |
| Base 12 | 58512 | 7bb12 |
| Base 13 | 4b213 | 6a713 |
| Base 14 | 42914 | 5c314 |
| Base 15 | 39b15 | 51b15 |
| Base 16 | 33516 | 47f16 |