31113137 has 16 divisors (see below), whose sum is σ = 35078400. Its totient is φ = 27350400.

The previous prime is 31113113. The next prime is 31113167. The reversal of 31113137 is 73131113.

It is not a de Polignac number, because 31113137 - 2⁶ = 31113073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31113167) 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 15 ways as a sum of consecutive naturals, for example, 66968 + ... + 67430.

It is an arithmetic number, because the mean of its divisors is an integer number (2192400).

Almost surely, 2^31113137 is an apocalyptic number.

It is an amenable number.

31113137 is a deficient number, since it is larger than the sum of its proper divisors (3965263).

31113137 is a wasteful number, since it uses less digits than its factorization.

31113137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 664.

The product of its digits is 189, while the sum is 20.

The square root of 31113137 is about 5577.9151122978. The cubic root of 31113137 is about 314.5197586757.

The spelling of 31113137 in words is "thirty-one million, one hundred thirteen thousand, one hundred thirty-seven".