23315015 has 4 divisors (see below), whose sum is σ = 27978024. Its totient is φ = 18652008.

The previous prime is 23315011. The next prime is 23315021. The reversal of 23315015 is 51051332.

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 23315015 - 2² = 23315011 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23315011) 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, 2331497 + ... + 2331506.

It is an arithmetic number, because the mean of its divisors is an integer number (6994506).

Almost surely, 2^23315015 is an apocalyptic number.

23315015 is a deficient number, since it is larger than the sum of its proper divisors (4663009).

23315015 is an equidigital number, since it uses as much as digits as its factorization.

23315015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4663008.

The product of its (nonzero) digits is 450, while the sum is 20.

The square root of 23315015 is about 4828.5624154607. The cubic root of 23315015 is about 285.6791640757.

Adding to 23315015 its reverse (51051332), we get a palindrome (74366347).

The spelling of 23315015 in words is "twenty-three million, three hundred fifteen thousand, fifteen".