531116816 has 20 divisors (see below), whose sum is σ = 1048456332. Its totient is φ = 260547456.

The previous prime is 531116809. The next prime is 531116821. The reversal of 531116816 is 618611135.

It can be written as a sum of positive squares in 2 ways, for example, as 166306816 + 364810000 = 12896^2 + 19100^2 .

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 3 ways as a sum of consecutive naturals, for example, 312311 + ... + 314006.

Almost surely, 2^531116816 is an apocalyptic number.

It is an amenable number.

531116816 is a deficient number, since it is larger than the sum of its proper divisors (517339516).

531116816 is a wasteful number, since it uses less digits than its factorization.

531116816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 626378 (or 626372 counting only the distinct ones).

The product of its digits is 4320, while the sum is 32.

The square root of 531116816 is about 23045.9717955221. The cubic root of 531116816 is about 809.8352639634.

The spelling of 531116816 in words is "five hundred thirty-one million, one hundred sixteen thousand, eight hundred sixteen".