231165561132 has 72 divisors (see below), whose sum is σ = 643768109712. Its totient is φ = 69356592000.

The previous prime is 231165561089. The next prime is 231165561161.

231165561132 is a `hidden beast` number, since 2 + 3 + 1 + 1 + 6 + 5 + 5 + 611 + 32 = 666.

231165561132 is nontrivially palindromic in base 10.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2849863 + ... + 2929854.

It is an arithmetic number, because the mean of its divisors is an integer number (8941223746).

Almost surely, 2^231165561132 is an apocalyptic number.

231165561132 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

231165561132 is an abundant number, since it is smaller than the sum of its proper divisors (412602548580).

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

231165561132 is a wasteful number, since it uses less digits than its factorization.

231165561132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5779839 (or 5779834 counting only the distinct ones).

The product of its digits is 32400, while the sum is 36.

It can be divided in two parts, 231165 and 561132, that added together give a palindrome (792297).

The spelling of 231165561132 in words is "two hundred thirty-one billion, one hundred sixty-five million, five hundred sixty-one thousand, one hundred thirty-two".