531512664 has 64 divisors (see below), whose sum is σ = 1349695200. Its totient is φ = 174403584.

The previous prime is 531512647. The next prime is 531512671. The reversal of 531512664 is 466215135.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 532614 + ... + 533610.

Almost surely, 2^531512664 is an apocalyptic number.

It is an amenable number.

531512664 is an abundant number, since it is smaller than the sum of its proper divisors (818182536).

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

531512664 is a wasteful number, since it uses less digits than its factorization.

531512664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1332 (or 1328 counting only the distinct ones).

The product of its digits is 21600, while the sum is 33.

The square root of 531512664 is about 23054.5584212754. The cubic root of 531512664 is about 810.0364074475.

Adding to 531512664 its reverse (466215135), we get a palindrome (997727799).

The spelling of 531512664 in words is "five hundred thirty-one million, five hundred twelve thousand, six hundred sixty-four".