31256456530613 has 2 divisors, whose sum is σ = 31256456530614. Its totient is φ = 31256456530612.

The previous prime is 31256456530583. The next prime is 31256456530639. The reversal of 31256456530613 is 31603565465213.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25853797823569 + 5402658707044 = 5084663^2 + 2324362^2 .

It is a cyclic number.

It is not a de Polignac number, because 31256456530613 - 2¹⁰ = 31256456529589 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31256456530913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15628228265306 + 15628228265307.

It is an arithmetic number, because the mean of its divisors is an integer number (15628228265307).

Almost surely, 2^{31256456530613} is an apocalyptic number.

It is an amenable number.

31256456530613 is a deficient number, since it is larger than the sum of its proper divisors (1).

31256456530613 is an equidigital number, since it uses as much as digits as its factorization.

31256456530613 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5832000, while the sum is 50.

The spelling of 31256456530613 in words is "thirty-one trillion, two hundred fifty-six billion, four hundred fifty-six million, five hundred thirty thousand, six hundred thirteen".