The folowing table expresses '520' in various number bases. 'DRx' shows the result of 'digit reducing' resulting in an X-digit long number.
| Base | DR10 | DR9 | DR8 | DR7 | DR6 | DR5 | DR4 | DR3 | DR2 | DR1 |
|---|---|---|---|---|---|---|---|---|---|---|
| 2 | 1000001000 | 10 | 1 | |||||||
| 3 | 201021 | 20 | 2 | |||||||
| 4 | 20020 | 10 | 1 | |||||||
| 5 | 4040 | 13 | 4 | |||||||
| 6 | 2224 | 14 | 5 | |||||||
| 7 | 1342 | 13 | 4 | |||||||
| 8 | 1010 | 2 | ||||||||
| 9 | 637 | 17 | 8 | |||||||
| 10 | 520 | 7 | ||||||||
| 11 | 433 | A | ||||||||
| 12 | 374 | 12 | 3 | |||||||
| 13 | 310 | 4 | ||||||||
| 14 | 292 | D | ||||||||
| 15 | 24A | 11 | 2 | |||||||
| 16 | 208 | A |
Factors: 23 * 5 * 13
520 is in the Pythagorean Triple: (231, 520, 569).