231568 has 20 divisors (see below), whose sum is σ = 460908. Its totient is φ = 112640.

The previous prime is 231563. The next prime is 231571. The reversal of 231568 is 865132.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 44944 + 186624 = 212^2 + 432^2 .

It is not an unprimeable number, because it can be changed into a prime (231563) by changing a digit.

231568 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 480 + ... + 832.

2²³¹⁵⁶⁸ is an apocalyptic number.

It is an amenable number.

231568 is a deficient number, since it is larger than the sum of its proper divisors (229340).

231568 is a wasteful number, since it uses less digits than its factorization.

231568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 402 (or 396 counting only the distinct ones).

The product of its digits is 1440, while the sum is 25.

The square root of 231568 is about 481.2151286067. The cubic root of 231568 is about 61.4081737112.

It can be divided in two parts, 2 and 31568, that multiplied together give a palindrome (63136).

The spelling of 231568 in words is "two hundred thirty-one thousand, five hundred sixty-eight".