31056013 has 16 divisors (see below), whose sum is σ = 34128000. Its totient is φ = 28147392.

The previous prime is 31055989. The next prime is 31056029. The reversal of 31056013 is 31065013.

It is a cyclic number.

It is not a de Polignac number, because 31056013 - 2²¹ = 28958861 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31056043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 86328 + ... + 86686.

It is an arithmetic number, because the mean of its divisors is an integer number (2133000).

Almost surely, 2^31056013 is an apocalyptic number.

It is an amenable number.

31056013 is a deficient number, since it is larger than the sum of its proper divisors (3071987).

31056013 is a wasteful number, since it uses less digits than its factorization.

31056013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 564.

The product of its (nonzero) digits is 270, while the sum is 19.

The square root of 31056013 is about 5572.7922085791. The cubic root of 31056013 is about 314.3271537153.

The spelling of 31056013 in words is "thirty-one million, fifty-six thousand, thirteen".