31113013 has 8 divisors (see below), whose sum is σ = 33448320. Its totient is φ = 28847520.

The previous prime is 31113011. The next prime is 31113023. The reversal of 31113013 is 31031113.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 31113013 - 2¹ = 31113011 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31112984 and 31113002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31113011) 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, 16528 + ... + 18313.

It is an arithmetic number, because the mean of its divisors is an integer number (4181040).

Almost surely, 2^31113013 is an apocalyptic number.

It is an amenable number.

31113013 is a deficient number, since it is larger than the sum of its proper divisors (2335307).

31113013 is a wasteful number, since it uses less digits than its factorization.

31113013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34907.

The product of its (nonzero) digits is 27, while the sum is 13.

The square root of 31113013 is about 5577.9039970225. The cubic root of 31113013 is about 314.5193408403.

Adding to 31113013 its reverse (31031113), we get a palindrome (62144126).

The spelling of 31113013 in words is "thirty-one million, one hundred thirteen thousand, thirteen".