31113657 has 12 divisors (see below), whose sum is σ = 45015984. Its totient is φ = 20708280.

The previous prime is 31113653. The next prime is 31113713. The reversal of 31113657 is 75631113.

31113657 is a `hidden beast` number, since 3 + 1 + 1 + 1 + 3 + 657 = 666.

It is not a de Polignac number, because 31113657 - 2² = 31113653 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 31113657.

It is not an unprimeable number, because it can be changed into a prime (31113653) 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, 3718 + ... + 8720.

It is an arithmetic number, because the mean of its divisors is an integer number (3751332).

Almost surely, 2^31113657 is an apocalyptic number.

It is an amenable number.

31113657 is a deficient number, since it is larger than the sum of its proper divisors (13902327).

31113657 is a wasteful number, since it uses less digits than its factorization.

31113657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5700 (or 5697 counting only the distinct ones).

The product of its digits is 1890, while the sum is 27.

The square root of 31113657 is about 5577.9617245012. The cubic root of 31113657 is about 314.5215108762.

The spelling of 31113657 in words is "thirty-one million, one hundred thirteen thousand, six hundred fifty-seven".