Compare 2011 vs 2015
| Property | 2011 | 2015 |
|---|---|---|
| Type | prime | composite number |
| Unique factors | 1 | 3 |
| Total factors | 1 | 3 |
| Prime factorization | 20111 | 51 × 131 × 311 |
| Prime factorization | 2011 | 5 × 13 × 31 |
| Divisors count | 2 | 8 |
| Divisors | 1, 2011 | 1, 5, 13, 31, 65, 155, 403, 2015 |
| Number of properties | 4 | 0 |
| Harmonic primes | 113th | |
| Isolated primes | 184th | |
| Primes | 305th | |
| Sexy primes (1st member) | 130th | |
| Roman numberals | MMXI | MMXV |
| Base 2 | 111110110112 | 111110111112 |
| Base 3 | 22021113 | 22021223 |
| Base 4 | 1331234 | 1331334 |
| Base 5 | 310215 | 310305 |
| Base 6 | 131516 | 131556 |
| Base 7 | 56027 | 56067 |
| Base 8 | 37338 | 37378 |
| Base 9 | 26749 | 26789 |
| Base 10 | 201110 | 201510 |
| Base 11 | 156911 | 157211 |
| Base 12 | 11b712 | 11bb12 |
| Base 13 | bb913 | bc013 |
| Base 14 | a3914 | a3d14 |
| Base 15 | 8e115 | 8e515 |
| Base 16 | 7db16 | 7df16 |