23115615 has 16 divisors (see below), whose sum is σ = 38178816. Its totient is φ = 11930400.

The previous prime is 23115613. The next prime is 23115629. The reversal of 23115615 is 51651132.

It is not a de Polignac number, because 23115615 - 2¹ = 23115613 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23115611) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24391 + ... + 25320.

It is an arithmetic number, because the mean of its divisors is an integer number (2386176).

Almost surely, 2^23115615 is an apocalyptic number.

23115615 is a deficient number, since it is larger than the sum of its proper divisors (15063201).

23115615 is a wasteful number, since it uses less digits than its factorization.

23115615 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49750.

The product of its digits is 900, while the sum is 24.

The square root of 23115615 is about 4807.8701105583. The cubic root of 23115615 is about 284.8624143536.

Adding to 23115615 its reverse (51651132), we get a palindrome (74766747).

The spelling of 23115615 in words is "twenty-three million, one hundred fifteen thousand, six hundred fifteen".