231431324 has 36 divisors (see below), whose sum is σ = 429685704. Its totient is φ = 109051488.

The previous prime is 231431311. The next prime is 231431329. The reversal of 231431324 is 423134132.

It is a self number, because there is not a number n which added to its sum of digits gives 231431324.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231431329) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 422819 + ... + 423365.

It is an arithmetic number, because the mean of its divisors is an integer number (11935714).

Almost surely, 2^231431324 is an apocalyptic number.

It is an amenable number.

231431324 is a deficient number, since it is larger than the sum of its proper divisors (198254380).

231431324 is a wasteful number, since it uses less digits than its factorization.

231431324 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 882 (or 861 counting only the distinct ones).

The product of its digits is 1728, while the sum is 23.

The square root of 231431324 is about 15212.8670539120. The cubic root of 231431324 is about 613.9608989519.

Adding to 231431324 its reverse (423134132), we get a palindrome (654565456).

The spelling of 231431324 in words is "two hundred thirty-one million, four hundred thirty-one thousand, three hundred twenty-four".