Numbers / 533

The Number 533

533 is composite: factorization 13 × 41. That gives 533 exactly 4 divisors: 1, 13, 41, 533. 533's proper divisors total just 55, 478 short of 533, the deficient case most of 533's neighbors share too. 533 has a digit sum of 11; for 533, the digital root works out to 2. 533 shares no factor with 2-12; 533's own divisors start beyond that range. 533 is 1000010101 in binary and 215 in hex; as a Roman numeral it's DXXXIII.