Numbers / 233

The Number 233

233 is prime: only 1 and 233 divide it evenly; the next prime after 233 is 239. 233's proper divisors total just 1, 232 short of 233, the deficient case most of 233's neighbors share too. 233 is also a Fibonacci number, since 144 + 89 = 233. 233 has a digit sum of 8; for 233, the digital root works out to 8. 233 shares no factor with 2-12; 233's own divisors start beyond that range. 233 is 11101001 in binary and E9 in hex; as a Roman numeral it's CCXXXIII.