Numbers / 219

The Number 219

219 is composite: factorization 3 × 73. That gives 219 exactly 4 divisors: 1, 3, 73, 219. 219's proper divisors total just 77, 142 short of 219, the deficient case most of 219's neighbors share too. 219 has a digit sum of 12; for 219, the digital root works out to 3. 219: 3 all divide 219 evenly, out of 2-12. 219 is 11011011 in binary and DB in hex; as a Roman numeral it's CCXIX.