31956465913 has 4 divisors (see below), whose sum is σ = 32043541120. Its totient is φ = 31869390708.

The previous prime is 31956465881. The next prime is 31956465923.

It is a happy number.

31956465913 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 31956465913 - 2⁵ = 31956465881 is a prime.

It is a super-3 number, since 3×31956465913³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31956465923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43537053 + ... + 43537786.

It is an arithmetic number, because the mean of its divisors is an integer number (8010885280).

Almost surely, 2^31956465913 is an apocalyptic number.

It is an amenable number.

31956465913 is a deficient number, since it is larger than the sum of its proper divisors (87075207).

31956465913 is an equidigital number, since it uses as much as digits as its factorization.

31956465913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87075206.

The product of its digits is 2624400, while the sum is 52.

The spelling of 31956465913 in words is "thirty-one billion, nine hundred fifty-six million, four hundred sixty-five thousand, nine hundred thirteen".