531313306913 has 2 divisors, whose sum is σ = 531313306914. Its totient is φ = 531313306912.

The previous prime is 531313306829. The next prime is 531313306939. The reversal of 531313306913 is 319603313135.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 471176534929 + 60136771984 = 686423^2 + 245228^2 .

It is a cyclic number.

It is not a de Polignac number, because 531313306913 - 2³⁶ = 462593830177 is a prime.

It is not a weakly prime, because it can be changed into another prime (531313306943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 265656653456 + 265656653457.

It is an arithmetic number, because the mean of its divisors is an integer number (265656653457).

Almost surely, 2^531313306913 is an apocalyptic number.

It is an amenable number.

531313306913 is a deficient number, since it is larger than the sum of its proper divisors (1).

531313306913 is an equidigital number, since it uses as much as digits as its factorization.

531313306913 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 65610, while the sum is 38.

The spelling of 531313306913 in words is "five hundred thirty-one billion, three hundred thirteen million, three hundred six thousand, nine hundred thirteen".