31112917 has 8 divisors (see below), whose sum is σ = 34067232. Its totient is φ = 28179600.

The previous prime is 31112909. The next prime is 31112923. The reversal of 31112917 is 71921113.

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 31112917 - 2³ = 31112909 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31112891 and 31112900.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31112957) 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, 2059 + ... + 8152.

It is an arithmetic number, because the mean of its divisors is an integer number (4258404).

Almost surely, 2^31112917 is an apocalyptic number.

It is an amenable number.

31112917 is a deficient number, since it is larger than the sum of its proper divisors (2954315).

31112917 is a wasteful number, since it uses less digits than its factorization.

31112917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10499.

The product of its digits is 378, while the sum is 25.

The square root of 31112917 is about 5577.8953916329. The cubic root of 31112917 is about 314.5190173542.

The spelling of 31112917 in words is "thirty-one million, one hundred twelve thousand, nine hundred seventeen".