31090113 has 6 divisors (see below), whose sum is σ = 44907954. Its totient is φ = 20726736.

The previous prime is 31090091. The next prime is 31090133. The reversal of 31090113 is 31109013.

It can be written as a sum of positive squares in only one way, i.e., 27217089 + 3873024 = 5217^2 + 1968^2 .

It is not a de Polignac number, because 31090113 - 2⁹ = 31089601 is a prime.

It is a Curzon number.

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

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1727220 + ... + 1727237.

It is an arithmetic number, because the mean of its divisors is an integer number (7484659).

Almost surely, 2^31090113 is an apocalyptic number.

It is an amenable number.

31090113 is a deficient number, since it is larger than the sum of its proper divisors (13817841).

31090113 is a wasteful number, since it uses less digits than its factorization.

31090113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3454463 (or 3454460 counting only the distinct ones).

The product of its (nonzero) digits is 81, while the sum is 18.

The square root of 31090113 is about 5575.8508767721. The cubic root of 31090113 is about 314.4421570512.

Adding to 31090113 its reverse (31109013), we get a palindrome (62199126).

The spelling of 31090113 in words is "thirty-one million, ninety thousand, one hundred thirteen".