23115 has 16 divisors (see below), whose sum is σ = 39168. Its totient is φ = 11616.

The previous prime is 23099. The next prime is 23117. The reversal of 23115 is 51132.

23115 = 20² + 21² + ... + 42².

It is not a de Polignac number, because 23115 - 2⁴ = 23099 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 23115.

It is not an unprimeable number, because it can be changed into a prime (23117) 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, 312 + ... + 378.

It is an arithmetic number, because the mean of its divisors is an integer number (2448).

2²³¹¹⁵ is an apocalyptic number.

23115 is a deficient number, since it is larger than the sum of its proper divisors (16053).

23115 is a wasteful number, since it uses less digits than its factorization.

23115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98.

The product of its digits is 30, while the sum is 12.

The square root of 23115 is about 152.0361799047. The cubic root of 23115 is about 28.4859888039.

Adding to 23115 its reverse (51132), we get a palindrome (74247).

The spelling of 23115 in words is "twenty-three thousand, one hundred fifteen".