Numbers / 550

The Number 550

550 is composite: factorization 2 × 5^2 × 11. That gives 550 exactly 12 divisors: 1, 2, 5, 10, 11, 22, 25, 50, 55, 110, 275, 550. 550's proper divisors total 566, 16 more than 550 itself, so 550 is abundant. 550 has a digit sum of 10; for 550, the digital root works out to 1. 550: 2, 5, 10, 11 all divide 550 evenly, out of 2-12. 550 is 1000100110 in binary and 226 in hex; as a Roman numeral it's DL.