Compare 2013 vs 2021
| Property | 2013 | 2021 |
|---|---|---|
| Type | composite number | semiprime |
| Unique factors | 3 | 2 |
| Total factors | 3 | 2 |
| Prime factorization | 31 × 111 × 611 | 431 × 471 |
| Prime factorization | 3 × 11 × 61 | 43 × 47 |
| Divisors count | 8 | 4 |
| Divisors | 1, 3, 11, 33, 61, 183, 671, 2013 | 1, 43, 47, 2021 |
| Number of properties | 0 | 1 |
| Semiprimes | 581st | |
| Roman numberals | MMXIII | MMXXI |
| Base 2 | 111110111012 | 111111001012 |
| Base 3 | 22021203 | 22022123 |
| Base 4 | 1331314 | 1332114 |
| Base 5 | 310235 | 310415 |
| Base 6 | 131536 | 132056 |
| Base 7 | 56047 | 56157 |
| Base 8 | 37358 | 37458 |
| Base 9 | 26769 | 26859 |
| Base 10 | 201310 | 202110 |
| Base 11 | 157011 | 157811 |
| Base 12 | 11b912 | 120512 |
| Base 13 | bbb13 | bc613 |
| Base 14 | a3b14 | a4514 |
| Base 15 | 8e315 | 8eb15 |
| Base 16 | 7dd16 | 7e516 |