231015138125052 has 24 divisors (see below), whose sum is σ = 539094930564736. Its totient is φ = 76996530574128.

The previous prime is 231015138125017. The next prime is 231015138125053. The reversal of 231015138125052 is 250521831510132.

It is a self number, because there is not a number n which added to its sum of digits gives 231015138125052.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231015138125053) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1064320408 + ... + 1064537439.

Almost surely, 2^{231015138125052} is an apocalyptic number.

It is an amenable number.

231015138125052 is an abundant number, since it is smaller than the sum of its proper divisors (308079792439684).

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

231015138125052 is a wasteful number, since it uses less digits than its factorization.

231015138125052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2128866897 (or 2128866895 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 39.

Adding to 231015138125052 its reverse (250521831510132), we get a palindrome (481536969635184).

The spelling of 231015138125052 in words is "two hundred thirty-one trillion, fifteen billion, one hundred thirty-eight million, one hundred twenty-five thousand, fifty-two".