31045091 has 12 divisors (see below), whose sum is σ = 38999856. Its totient is φ = 24190320.

The previous prime is 31045073. The next prime is 31045093. The reversal of 31045091 is 19054013.

It is a happy number.

It is not a de Polignac number, because 31045091 - 2¹⁴ = 31028707 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31045093) 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, 17480 + ... + 19173.

It is an arithmetic number, because the mean of its divisors is an integer number (3249988).

Almost surely, 2^31045091 is an apocalyptic number.

31045091 is a deficient number, since it is larger than the sum of its proper divisors (7954765).

31045091 is a wasteful number, since it uses less digits than its factorization.

31045091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36682 (or 36671 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 23.

The square root of 31045091 is about 5571.8121827642. The cubic root of 31045091 is about 314.2903011235.

The spelling of 31045091 in words is "thirty-one million, forty-five thousand, ninety-one".