Numbers / 212

The Number 212

212 is composite: factorization 2^2 × 53. That gives 212 exactly 6 divisors: 1, 2, 4, 53, 106, 212. 212's proper divisors total just 166, 46 short of 212, the deficient case most of 212's neighbors share too. 212 is also a palindrome, since 212 reads identically forwards and backwards. 212 has a digit sum of 5; for 212, the digital root works out to 5. 212: 2, 4 all divide 212 evenly, out of 2-12. 212 is 11010100 in binary and D4 in hex; as a Roman numeral it's CCXII.