231321232 has 30 divisors (see below), whose sum is σ = 454576002. Its totient is φ = 114034176.

The previous prime is 231321191. The next prime is 231321301. The reversal of 231321232 is 232123132.

231321232 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 118026496 + 113294736 = 10864^2 + 10644^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 83908 + ... + 86620.

Almost surely, 2^231321232 is an apocalyptic number.

It is an amenable number.

231321232 is a deficient number, since it is larger than the sum of its proper divisors (223254770).

231321232 is an equidigital number, since it uses as much as digits as its factorization.

231321232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2867 (or 2788 counting only the distinct ones).

The product of its digits is 432, while the sum is 19.

The square root of 231321232 is about 15209.2482391471. The cubic root of 231321232 is about 613.8635296722.

Adding to 231321232 its reverse (232123132), we get a palindrome (463444364).

The spelling of 231321232 in words is "two hundred thirty-one million, three hundred twenty-one thousand, two hundred thirty-two".