231333313 has 4 divisors (see below), whose sum is σ = 232020100. Its totient is φ = 230646528.

The previous prime is 231333301. The next prime is 231333371. The reversal of 231333313 is 313333132.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 110838784 + 120494529 = 10528^2 + 10977^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231333313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231333373) 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, 342888 + ... + 343561.

It is an arithmetic number, because the mean of its divisors is an integer number (58005025).

Almost surely, 2^231333313 is an apocalyptic number.

It is an amenable number.

231333313 is a deficient number, since it is larger than the sum of its proper divisors (686787).

231333313 is an equidigital number, since it uses as much as digits as its factorization.

231333313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 686786.

The product of its digits is 1458, while the sum is 22.

The square root of 231333313 is about 15209.6453936310. The cubic root of 231333313 is about 613.8742160470.

Adding to 231333313 its reverse (313333132), we get a palindrome (544666445).

It can be divided in two parts, 2 and 31333313, that multiplied together give a palindrome (62666626).

The spelling of 231333313 in words is "two hundred thirty-one million, three hundred thirty-three thousand, three hundred thirteen".