31503955313 has 16 divisors (see below), whose sum is σ = 32747258880. Its totient is φ = 30275212800.

The previous prime is 31503955291. The next prime is 31503955367. The reversal of 31503955313 is 31355930513.

It is a cyclic number.

It is not a de Polignac number, because 31503955313 - 2⁸ = 31503955057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31503975313) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6670793 + ... + 6675513.

It is an arithmetic number, because the mean of its divisors is an integer number (2046703680).

Almost surely, 2^31503955313 is an apocalyptic number.

It is an amenable number.

31503955313 is a deficient number, since it is larger than the sum of its proper divisors (1243303567).

31503955313 is a wasteful number, since it uses less digits than its factorization.

31503955313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6208.

The product of its (nonzero) digits is 91125, while the sum is 38.

The spelling of 31503955313 in words is "thirty-one billion, five hundred three million, nine hundred fifty-five thousand, three hundred thirteen".