231332644 has 24 divisors (see below), whose sum is σ = 410574528. Its totient is φ = 114036000.

The previous prime is 231332611. The next prime is 231332663. The reversal of 231332644 is 446233132.

231332644 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 102294 + ... + 104530.

It is an arithmetic number, because the mean of its divisors is an integer number (17107272).

Almost surely, 2^231332644 is an apocalyptic number.

It is an amenable number.

231332644 is a deficient number, since it is larger than the sum of its proper divisors (179241884).

231332644 is a wasteful number, since it uses less digits than its factorization.

231332644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2595 (or 2593 counting only the distinct ones).

The product of its digits is 10368, while the sum is 28.

The square root of 231332644 is about 15209.6234009919. The cubic root of 231332644 is about 613.8736242858.

Adding to 231332644 its reverse (446233132), we get a palindrome (677565776).

The spelling of 231332644 in words is "two hundred thirty-one million, three hundred thirty-two thousand, six hundred forty-four".