231123320032 has 24 divisors (see below), whose sum is σ = 496389858552. Its totient is φ = 105056054400.

The previous prime is 231123319981. The next prime is 231123320063. The reversal of 231123320032 is 230023321132.

It is a super-2 number, since 2×231123320032² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 231123319985 and 231123320012.

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, 328299819 + ... + 328300522.

It is an arithmetic number, because the mean of its divisors is an integer number (20682910773).

Almost surely, 2^231123320032 is an apocalyptic number.

231123320032 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

231123320032 is an abundant number, since it is smaller than the sum of its proper divisors (265266538520).

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

231123320032 is a wasteful number, since it uses less digits than its factorization.

231123320032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 656600362 (or 656600354 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 22.

Adding to 231123320032 its reverse (230023321132), we get a palindrome (461146641164).

It can be divided in two parts, 231123 and 320032, that added together give a palindrome (551155).

The spelling of 231123320032 in words is "two hundred thirty-one billion, one hundred twenty-three million, three hundred twenty thousand, thirty-two".