31265656213 has 12 divisors (see below), whose sum is σ = 34412734944. Its totient is φ = 28384987400.

The previous prime is 31265656183. The next prime is 31265656217.

31265656213 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 31265656213 - 2⁵ = 31265656181 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31265656217) 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 in 11 ways as a sum of consecutive naturals, for example, 83983 + ... + 263788.

It is an arithmetic number, because the mean of its divisors is an integer number (2867727912).

Almost surely, 2^31265656213 is an apocalyptic number.

It is an amenable number.

31265656213 is a deficient number, since it is larger than the sum of its proper divisors (3147078731).

31265656213 is a wasteful number, since it uses less digits than its factorization.

31265656213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 348536 (or 348525 counting only the distinct ones).

The product of its digits is 194400, while the sum is 40.

The spelling of 31265656213 in words is "thirty-one billion, two hundred sixty-five million, six hundred fifty-six thousand, two hundred thirteen".