231312032 has 24 divisors (see below), whose sum is σ = 520452576. Its totient is φ = 99133632.

The previous prime is 231312019. The next prime is 231312043. The reversal of 231312032 is 230213132.

231312032 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×231312032² = 107010512295938048, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 231312032.

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, 516098 + ... + 516545.

It is an arithmetic number, because the mean of its divisors is an integer number (21685524).

Almost surely, 2^231312032 is an apocalyptic number.

It is an amenable number.

231312032 is an abundant number, since it is smaller than the sum of its proper divisors (289140544).

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

231312032 is a wasteful number, since it uses less digits than its factorization.

231312032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1032660 (or 1032652 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 231312032 is about 15208.9457885811. The cubic root of 231312032 is about 613.8553914664.

Adding to 231312032 its reverse (230213132), we get a palindrome (461525164).

The spelling of 231312032 in words is "two hundred thirty-one million, three hundred twelve thousand, thirty-two".