231324013 has 2 divisors, whose sum is σ = 231324014. Its totient is φ = 231324012.

The previous prime is 231323971. The next prime is 231324019. The reversal of 231324013 is 310423132.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 161467849 + 69856164 = 12707^2 + 8358^2 .

It is a cyclic number.

It is not a de Polignac number, because 231324013 - 2⁹ = 231323501 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231324019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115662006 + 115662007.

It is an arithmetic number, because the mean of its divisors is an integer number (115662007).

Almost surely, 2^231324013 is an apocalyptic number.

It is an amenable number.

231324013 is a deficient number, since it is larger than the sum of its proper divisors (1).

231324013 is an equidigital number, since it uses as much as digits as its factorization.

231324013 is an odious number, because the sum of its binary digits is odd.

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

The square root of 231324013 is about 15209.3396635094. The cubic root of 231324013 is about 613.8659896678.

Adding to 231324013 its reverse (310423132), we get a palindrome (541747145).

The spelling of 231324013 in words is "two hundred thirty-one million, three hundred twenty-four thousand, thirteen".