31320651256413 has 16 divisors (see below), whose sum is σ = 43584567716736. Its totient is φ = 19968918210560.

The previous prime is 31320651256387. The next prime is 31320651256417. The reversal of 31320651256413 is 31465215602313.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 31320651256413 - 2⁵ = 31320651256381 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31320651256417) 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 in 15 ways as a sum of consecutive naturals, for example, 41337720 + ... + 42088577.

It is an arithmetic number, because the mean of its divisors is an integer number (2724035482296).

Almost surely, 2^{31320651256413} is an apocalyptic number.

It is an amenable number.

31320651256413 is a deficient number, since it is larger than the sum of its proper divisors (12263916460323).

31320651256413 is a wasteful number, since it uses less digits than its factorization.

31320651256413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83431764.

The product of its (nonzero) digits is 388800, while the sum is 42.

Adding to 31320651256413 its reverse (31465215602313), we get a palindrome (62785866858726).

The spelling of 31320651256413 in words is "thirty-one trillion, three hundred twenty billion, six hundred fifty-one million, two hundred fifty-six thousand, four hundred thirteen".