231332320 has 24 divisors (see below), whose sum is σ = 546522984. Its totient is φ = 92532864.

The previous prime is 231332287. The next prime is 231332329. The reversal of 231332320 is 23233132.

It is a happy number.

231332320 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231332329) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 722754 + ... + 723073.

It is an arithmetic number, because the mean of its divisors is an integer number (22771791).

Almost surely, 2^231332320 is an apocalyptic number.

231332320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231332320 is an abundant number, since it is smaller than the sum of its proper divisors (315190664).

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

231332320 is a wasteful number, since it uses less digits than its factorization.

231332320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1445842 (or 1445834 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 19.

The square root of 231332320 is about 15209.6127498369. The cubic root of 231332320 is about 613.8733376925.

Adding to 231332320 its reverse (23233132), we get a palindrome (254565452).

The spelling of 231332320 in words is "two hundred thirty-one million, three hundred thirty-two thousand, three hundred twenty".