231532533252 has 18 divisors (see below), whose sum is σ = 585262792478. Its totient is φ = 77177511072.

The previous prime is 231532533247. The next prime is 231532533269. The reversal of 231532533252 is 252335235132.

231532533252 is a `hidden beast` number, since 2 + 3 + 1 + 5 + 325 + 3 + 325 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 178680362436 + 52852170816 = 422706^2 + 229896^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 6431459257 = 231532533252 / (2 + 3 + 1 + 5 + 3 + 2 + 5 + 3 + 3 + 2 + 5 + 2).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3215729593 + ... + 3215729664.

Almost surely, 2^231532533252 is an apocalyptic number.

It is an amenable number.

231532533252 is an abundant number, since it is smaller than the sum of its proper divisors (353730259226).

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

231532533252 is a wasteful number, since it uses less digits than its factorization.

231532533252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6431459267 (or 6431459262 counting only the distinct ones).

The product of its digits is 162000, while the sum is 36.

Adding to 231532533252 its reverse (252335235132), we get a palindrome (483867768384).

The spelling of 231532533252 in words is "two hundred thirty-one billion, five hundred thirty-two million, five hundred thirty-three thousand, two hundred fifty-two".