Numbers / 451

The Number 451

451 is composite: factorization 11 × 41. That gives 451 exactly 4 divisors: 1, 11, 41, 451. 451's proper divisors total just 53, 398 short of 451, the deficient case most of 451's neighbors share too. 451 has a digit sum of 10; for 451, the digital root works out to 1. 451: 11 all divide 451 evenly, out of 2-12. 451 is 111000011 in binary and 1C3 in hex; as a Roman numeral it's CDLI.