231304040032 has 72 divisors (see below), whose sum is σ = 502663498848. Its totient is φ = 104151598080.

The previous prime is 231304040021. The next prime is 231304040141. The reversal of 231304040032 is 230040403132.

It is a happy number.

It is a super-2 number, since 2×231304040032² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 231304039985 and 231304040012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 533913 + ... + 864679.

It is an arithmetic number, because the mean of its divisors is an integer number (6981437484).

Almost surely, 2^231304040032 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 231304040032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (251331749424).

231304040032 is an abundant number, since it is smaller than the sum of its proper divisors (271359458816).

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

231304040032 is a wasteful number, since it uses less digits than its factorization.

231304040032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 330872 (or 330823 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 22.

Adding to 231304040032 its reverse (230040403132), we get a palindrome (461344443164).

The spelling of 231304040032 in words is "two hundred thirty-one billion, three hundred four million, forty thousand, thirty-two".