Numbers / 524

The Number 524

524 is composite: factorization 2^2 × 131. That gives 524 exactly 6 divisors: 1, 2, 4, 131, 262, 524. 524's proper divisors total just 400, 124 short of 524, the deficient case most of 524's neighbors share too. 524 has a digit sum of 11; for 524, the digital root works out to 2. 524: 2, 4 all divide 524 evenly, out of 2-12. 524 is 1000001100 in binary and 20C in hex; as a Roman numeral it's DXXIV.