231313135512 has 16 divisors (see below), whose sum is σ = 578282838840. Its totient is φ = 77104378496.

The previous prime is 231313135453. The next prime is 231313135531. The reversal of 231313135512 is 215531313132.

It is a self number, because there is not a number n which added to its sum of digits gives 231313135512.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4819023633 + ... + 4819023680.

Almost surely, 2^231313135512 is an apocalyptic number.

It is an amenable number.

231313135512 is an abundant number, since it is smaller than the sum of its proper divisors (346969703328).

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

231313135512 is a wasteful number, since it uses less digits than its factorization.

231313135512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9638047322 (or 9638047318 counting only the distinct ones).

The product of its digits is 8100, while the sum is 30.

Adding to 231313135512 its reverse (215531313132), we get a palindrome (446844448644).

The spelling of 231313135512 in words is "two hundred thirty-one billion, three hundred thirteen million, one hundred thirty-five thousand, five hundred twelve".