23915 has 4 divisors (see below), whose sum is σ = 28704. Its totient is φ = 19128.

The previous prime is 23911. The next prime is 23917. The reversal of 23915 is 51932.

23915 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

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 23915 - 2² = 23911 is a prime.

It is an Ulam number.

It is a Duffinian number.

23915 is strictly pandigital in base 6.

It is not an unprimeable number, because it can be changed into a prime (23911) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2387 + ... + 2396.

It is an arithmetic number, because the mean of its divisors is an integer number (7176).

2²³⁹¹⁵ is an apocalyptic number.

23915 is a deficient number, since it is larger than the sum of its proper divisors (4789).

23915 is an equidigital number, since it uses as much as digits as its factorization.

23915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4788.

The product of its digits is 270, while the sum is 20.

The square root of 23915 is about 154.6447541949. The cubic root of 23915 is about 28.8108980104.

The spelling of 23915 in words is "twenty-three thousand, nine hundred fifteen".