Numbers / 522

The Number 522

522 is composite: factorization 2 × 3^2 × 29. That gives 522 exactly 12 divisors: 1, 2, 3, 6, 9, 18, 29, 58, 87, 174, 261, 522. 522's proper divisors total 648, 126 more than 522 itself, so 522 is abundant. 522 has a digit sum of 9; for 522, the digital root works out to 9. 522: 2, 3, 6, 9 all divide 522 evenly, out of 2-12. 522 is 1000001010 in binary and 20A in hex; as a Roman numeral it's DXXII.