Numbers / 229

The Number 229

229 is prime: only 1 and 229 divide it evenly; the next prime after 229 is 233. 229's proper divisors total just 1, 228 short of 229, the deficient case most of 229's neighbors share too. 229 has a digit sum of 13; for 229, the digital root works out to 4. 229 shares no factor with 2-12; 229's own divisors start beyond that range. 229 is 11100101 in binary and E5 in hex; as a Roman numeral it's CCXXIX.