31105089 has 12 divisors (see below), whose sum is σ = 44982756. Its totient is φ = 20712192.

The previous prime is 31105057. The next prime is 31105097. The reversal of 31105089 is 98050113.

It can be written as a sum of positive squares in 2 ways, for example, as 9090225 + 22014864 = 3015^2 + 4692^2 .

It is not a de Polignac number, because 31105089 - 2⁵ = 31105057 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31905089) 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, 9289 + ... + 12185.

It is an arithmetic number, because the mean of its divisors is an integer number (3748563).

Almost surely, 2^31105089 is an apocalyptic number.

It is an amenable number.

31105089 is a deficient number, since it is larger than the sum of its proper divisors (13877667).

31105089 is a wasteful number, since it uses less digits than its factorization.

31105089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4096 (or 4093 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 27.

The square root of 31105089 is about 5577.1936491393. The cubic root of 31105089 is about 314.4926375135.

The spelling of 31105089 in words is "thirty-one million, one hundred five thousand, eighty-nine".