231553131132 has 24 divisors (see below), whose sum is σ = 542134642896. Its totient is φ = 76920947968.

The previous prime is 231553131067. The next prime is 231553131149. The reversal of 231553131132 is 231131355132.

It is a self number, because there is not a number n which added to its sum of digits gives 231553131132.

It is a congruent number.

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, 32924973 + ... + 32932004.

It is an arithmetic number, because the mean of its divisors is an integer number (22588943454).

Almost surely, 2^231553131132 is an apocalyptic number.

It is an amenable number.

231553131132 is an abundant number, since it is smaller than the sum of its proper divisors (310581511764).

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

231553131132 is a wasteful number, since it uses less digits than its factorization.

231553131132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65857277 (or 65857275 counting only the distinct ones).

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

Adding to 231553131132 its reverse (231131355132), we get a palindrome (462684486264).

The spelling of 231553131132 in words is "two hundred thirty-one billion, five hundred fifty-three million, one hundred thirty-one thousand, one hundred thirty-two".