23115015 has 72 divisors (see below), whose sum is σ = 50897808. Its totient is φ = 9596160.

The previous prime is 23114999. The next prime is 23115041. The reversal of 23115015 is 51051132.

It is not a de Polignac number, because 23115015 - 2⁴ = 23114999 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 23779 + ... + 24731.

It is an arithmetic number, because the mean of its divisors is an integer number (706914).

Almost surely, 2^23115015 is an apocalyptic number.

23115015 is an abundant number, since it is smaller than the sum of its proper divisors (27782793).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

23115015 is a wasteful number, since it uses less digits than its factorization.

23115015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 989 (or 979 counting only the distinct ones).

The product of its (nonzero) digits is 150, while the sum is 18.

The square root of 23115015 is about 4807.8077124611. The cubic root of 23115015 is about 284.8599496571.

Adding to 23115015 its reverse (51051132), we get a palindrome (74166147).

The spelling of 23115015 in words is "twenty-three million, one hundred fifteen thousand, fifteen".