3131320113 has 12 divisors (see below), whose sum is σ = 4690537488. Its totient is φ = 2087546580.

The previous prime is 3131320111. The next prime is 3131320133. The reversal of 3131320113 is 3110231313.

It is a happy number.

It is not a de Polignac number, because 3131320113 - 2¹ = 3131320111 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (3131320111) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6442803 + ... + 6443288.

It is an arithmetic number, because the mean of its divisors is an integer number (390878124).

Almost surely, 2^3131320113 is an apocalyptic number.

It is an amenable number.

3131320113 is a deficient number, since it is larger than the sum of its proper divisors (1559217375).

3131320113 is an equidigital number, since it uses as much as digits as its factorization.

3131320113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12886106 (or 12886094 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 18.

The square root of 3131320113 is about 55958.1996940573. The cubic root of 3131320113 is about 1462.9938119443.

Adding to 3131320113 its reverse (3110231313), we get a palindrome (6241551426).

The spelling of 3131320113 in words is "three billion, one hundred thirty-one million, three hundred twenty thousand, one hundred thirteen".