31031013 has 8 divisors (see below), whose sum is σ = 44557408. Its totient is φ = 19095984.

The previous prime is 31031003. The next prime is 31031017. The reversal of 31031013 is 31013013.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 31031013 - 2⁵ = 31030981 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31031013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31031017) 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 7 ways as a sum of consecutive naturals, for example, 397795 + ... + 397872.

It is an arithmetic number, because the mean of its divisors is an integer number (5569676).

Almost surely, 2^31031013 is an apocalyptic number.

It is an amenable number.

31031013 is a deficient number, since it is larger than the sum of its proper divisors (13526395).

31031013 is a wasteful number, since it uses less digits than its factorization.

31031013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 795683.

The product of its (nonzero) digits is 27, while the sum is 12.

The square root of 31031013 is about 5570.5487162397. The cubic root of 31031013 is about 314.2427869252.

Adding to 31031013 its reverse (31013013), we get a palindrome (62044026).

The spelling of 31031013 in words is "thirty-one million, thirty-one thousand, thirteen".