31090137 has 16 divisors (see below), whose sum is σ = 46992960. Its totient is φ = 18124992.

The previous prime is 31090133. The next prime is 31090139. The reversal of 31090137 is 73109013.

It is not a de Polignac number, because 31090137 - 2² = 31090133 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31090133) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20238 + ... + 21719.

It is an arithmetic number, because the mean of its divisors is an integer number (2937060).

Almost surely, 2^31090137 is an apocalyptic number.

It is an amenable number.

31090137 is a deficient number, since it is larger than the sum of its proper divisors (15902823).

31090137 is a wasteful number, since it uses less digits than its factorization.

31090137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41992.

The product of its (nonzero) digits is 567, while the sum is 24.

The square root of 31090137 is about 5575.8530289096. The cubic root of 31090137 is about 314.4422379624.

The spelling of 31090137 in words is "thirty-one million, ninety thousand, one hundred thirty-seven".