231311020524 has 24 divisors (see below), whose sum is σ = 545069536368. Its totient is φ = 76340270400.

The previous prime is 231311020519. The next prime is 231311020643. The reversal of 231311020524 is 425020113132.

It is a junction number, because it is equal to n+sod(n) for n = 231311020494 and 231311020503.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 95424127 + ... + 95426550.

It is an arithmetic number, because the mean of its divisors is an integer number (22711230682).

Almost surely, 2^231311020524 is an apocalyptic number.

It is an amenable number.

231311020524 is an abundant number, since it is smaller than the sum of its proper divisors (313758515844).

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

231311020524 is a wasteful number, since it uses less digits than its factorization.

231311020524 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190850785 (or 190850783 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

Adding to 231311020524 its reverse (425020113132), we get a palindrome (656331133656).

The spelling of 231311020524 in words is "two hundred thirty-one billion, three hundred eleven million, twenty thousand, five hundred twenty-four".