531231154564 has 48 divisors (see below), whose sum is σ = 1042056259776. Its totient is φ = 234834768000.

The previous prime is 531231154549. The next prime is 531231154591. The reversal of 531231154564 is 465451132135.

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, 3529039 + ... + 3676489.

It is an arithmetic number, because the mean of its divisors is an integer number (21709505412).

Almost surely, 2^531231154564 is an apocalyptic number.

It is an amenable number.

531231154564 is a deficient number, since it is larger than the sum of its proper divisors (510825105212).

531231154564 is a wasteful number, since it uses less digits than its factorization.

531231154564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149716 (or 149714 counting only the distinct ones).

The product of its digits is 216000, while the sum is 40.

Adding to 531231154564 its reverse (465451132135), we get a palindrome (996682286699).

The spelling of 531231154564 in words is "five hundred thirty-one billion, two hundred thirty-one million, one hundred fifty-four thousand, five hundred sixty-four".