23513091 has 36 divisors (see below), whose sum is σ = 39016728. Its totient is φ = 12515328.

The previous prime is 23513071. The next prime is 23513117. The reversal of 23513091 is 19031532.

It is a happy number.

It is not a de Polignac number, because 23513091 - 2⁶ = 23513027 is a prime.

It is not an unprimeable number, because it can be changed into a prime (23513011) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 242355 + ... + 242451.

It is an arithmetic number, because the mean of its divisors is an integer number (1083798).

Almost surely, 2^23513091 is an apocalyptic number.

23513091 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

23513091 is a deficient number, since it is larger than the sum of its proper divisors (15503637).

23513091 is an equidigital number, since it uses as much as digits as its factorization.

23513091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 228 (or 124 counting only the distinct ones).

The product of its (nonzero) digits is 810, while the sum is 24.

The square root of 23513091 is about 4849.0299029806. The cubic root of 23513091 is about 286.4858930279.

The spelling of 23513091 in words is "twenty-three million, five hundred thirteen thousand, ninety-one".