231312113130 has 96 divisors (see below), whose sum is σ = 683773119936. Its totient is φ = 49761255936.

The previous prime is 231312113093. The next prime is 231312113173. The reversal of 231312113130 is 31311213132.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 231312113097 and 231312113106.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4603104 + ... + 4653083.

It is an arithmetic number, because the mean of its divisors is an integer number (7122636666).

Almost surely, 2^231312113130 is an apocalyptic number.

231312113130 is an abundant number, since it is smaller than the sum of its proper divisors (452461006806).

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

231312113130 is a wasteful number, since it uses less digits than its factorization.

231312113130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9256228 (or 9256221 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 21.

Adding to 231312113130 its reverse (31311213132), we get a palindrome (262623326262).

The spelling of 231312113130 in words is "two hundred thirty-one billion, three hundred twelve million, one hundred thirteen thousand, one hundred thirty".