531111621324 has 48 divisors (see below), whose sum is σ = 1260294613760. Its totient is φ = 174057059520.

The previous prime is 531111621319. The next prime is 531111621349. The reversal of 531111621324 is 423126111135.

It is a junction number, because it is equal to n+sod(n) for n = 531111621291 and 531111621300.

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, 1373887 + ... + 1717494.

Almost surely, 2^531111621324 is an apocalyptic number.

It is an amenable number.

531111621324 is an abundant number, since it is smaller than the sum of its proper divisors (729182992436).

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

531111621324 is a wasteful number, since it uses less digits than its factorization.

531111621324 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3091630 (or 3091628 counting only the distinct ones).

The product of its digits is 4320, while the sum is 30.

Adding to 531111621324 its reverse (423126111135), we get a palindrome (954237732459).

The spelling of 531111621324 in words is "five hundred thirty-one billion, one hundred eleven million, six hundred twenty-one thousand, three hundred twenty-four".