23513915 has 4 divisors (see below), whose sum is σ = 28216704. Its totient is φ = 18811128.

The previous prime is 23513881. The next prime is 23513929. The reversal of 23513915 is 51931532.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 23513915 - 2¹⁰ = 23512891 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2351387 + ... + 2351396.

It is an arithmetic number, because the mean of its divisors is an integer number (7054176).

Almost surely, 2^23513915 is an apocalyptic number.

23513915 is a deficient number, since it is larger than the sum of its proper divisors (4702789).

23513915 is an equidigital number, since it uses as much as digits as its factorization.

23513915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4702788.

The product of its digits is 4050, while the sum is 29.

The square root of 23513915 is about 4849.1148676846. The cubic root of 23513915 is about 286.4892395554.

The spelling of 23513915 in words is "twenty-three million, five hundred thirteen thousand, nine hundred fifteen".