31103091 has 12 divisors (see below), whose sum is σ = 45077032. Its totient is φ = 20666016.

The previous prime is 31103071. The next prime is 31103099. The reversal of 31103091 is 19030113.

It is not a de Polignac number, because 31103091 - 2¹⁵ = 31070323 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31103099) 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, 2866 + ... + 8391.

Almost surely, 2^31103091 is an apocalyptic number.

31103091 is a deficient number, since it is larger than the sum of its proper divisors (13973941).

31103091 is a wasteful number, since it uses less digits than its factorization.

31103091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11570 (or 11567 counting only the distinct ones).

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

The square root of 31103091 is about 5577.0145239187. The cubic root of 31103091 is about 314.4859036771.

The spelling of 31103091 in words is "thirty-one million, one hundred three thousand, ninety-one".