531118368 has 108 divisors (see below), whose sum is σ = 1660265334. Its totient is φ = 160934400.

The previous prime is 531118349. The next prime is 531118391. The reversal of 531118368 is 863811135.

531118368 is a `hidden beast` number, since 531 + 118 + 3 + 6 + 8 = 666.

It can be written as a sum of positive squares in only one way, i.e., 386830224 + 144288144 = 19668^2 + 12012^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 27228 + ... + 42468.

Almost surely, 2^531118368 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 531118368, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (830132667).

531118368 is an abundant number, since it is smaller than the sum of its proper divisors (1129146966).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

531118368 is a wasteful number, since it uses less digits than its factorization.

531118368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15279 (or 15257 counting only the distinct ones).

The product of its digits is 17280, while the sum is 36.

The square root of 531118368 is about 23046.0054673256. The cubic root of 531118368 is about 809.8360527812.

The spelling of 531118368 in words is "five hundred thirty-one million, one hundred eighteen thousand, three hundred sixty-eight".