23115405 has 16 divisors (see below), whose sum is σ = 37099584. Its totient is φ = 12289920.

The previous prime is 23115403. The next prime is 23115409. The reversal of 23115405 is 50451132.

It is not a de Polignac number, because 23115405 - 2¹ = 23115403 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23115403) 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, 2985 + ... + 7425.

It is an arithmetic number, because the mean of its divisors is an integer number (2318724).

Almost surely, 2^23115405 is an apocalyptic number.

It is an amenable number.

23115405 is a deficient number, since it is larger than the sum of its proper divisors (13984179).

23115405 is a wasteful number, since it uses less digits than its factorization.

23115405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4796.

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 23115405 is about 4807.8482713164. The cubic root of 23115405 is about 284.8615517147.

Adding to 23115405 its reverse (50451132), we get a palindrome (73566537).

The spelling of 23115405 in words is "twenty-three million, one hundred fifteen thousand, four hundred five".