Numbers / 527

The Number 527

527 is composite: factorization 17 × 31. That gives 527 exactly 4 divisors: 1, 17, 31, 527. 527's proper divisors total just 49, 478 short of 527, the deficient case most of 527's neighbors share too. 527 has a digit sum of 14; for 527, the digital root works out to 5. 527 shares no factor with 2-12; 527's own divisors start beyond that range. 527 is 1000001111 in binary and 20F in hex; as a Roman numeral it's DXXVII.