Numbers / 54

The Number 54

54 is composite: factorization 2 × 3^3. That gives 54 exactly 8 divisors: 1, 2, 3, 6, 9, 18, 27, 54. 54's proper divisors total 66, 12 more than 54 itself, so 54 is abundant. 54 has a digit sum of 9; for 54, the digital root works out to 9. 54: 2, 3, 6, 9 all divide 54 evenly, out of 2-12. 54 is 110110 in binary and 36 in hex; as a Roman numeral it's LIV.