31957275913 has 2 divisors, whose sum is σ = 31957275914. Its totient is φ = 31957275912.

The previous prime is 31957275887. The next prime is 31957275947.

31957275913 is nontrivially palindromic in base 10.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16534616569 + 15422659344 = 128587^2 + 124188^2 .

It is a palprime.

It is a cyclic number.

It is not a de Polignac number, because 31957275913 - 2⁹ = 31957275401 is a prime.

It is not a weakly prime, because it can be changed into another prime (31957275953) 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, 15978637956 + 15978637957.

It is an arithmetic number, because the mean of its divisors is an integer number (15978637957).

Almost surely, 2^31957275913 is an apocalyptic number.

It is an amenable number.

31957275913 is a deficient number, since it is larger than the sum of its proper divisors (1).

31957275913 is an equidigital number, since it uses as much as digits as its factorization.

31957275913 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1786050, while the sum is 52.

The spelling of 31957275913 in words is "thirty-one billion, nine hundred fifty-seven million, two hundred seventy-five thousand, nine hundred thirteen".