Numbers / 559

The Number 559

559 is composite: factorization 13 × 43. That gives 559 exactly 4 divisors: 1, 13, 43, 559. 559's proper divisors total just 57, 502 short of 559, the deficient case most of 559's neighbors share too. 559 has a digit sum of 19; for 559, the digital root works out to 1. 559 shares no factor with 2-12; 559's own divisors start beyond that range. 559 is 1000101111 in binary and 22F in hex; as a Roman numeral it's DLIX.