23105523 has 16 divisors (see below), whose sum is σ = 35297280. Its totient is φ = 13169856.

The previous prime is 23105503. The next prime is 23105527. The reversal of 23105523 is 32550132.

It is not a de Polignac number, because 23105523 - 2⁸ = 23105267 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 23105523.

It is not an unprimeable number, because it can be changed into a prime (23105527) 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, 8911 + ... + 11207.

It is an arithmetic number, because the mean of its divisors is an integer number (2206080).

Almost surely, 2^23105523 is an apocalyptic number.

23105523 is a deficient number, since it is larger than the sum of its proper divisors (12191757).

23105523 is a wasteful number, since it uses less digits than its factorization.

23105523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2786.

The product of its (nonzero) digits is 900, while the sum is 21.

The square root of 23105523 is about 4806.8204667951. The cubic root of 23105523 is about 284.8209524824.

Adding to 23105523 its reverse (32550132), we get a palindrome (55655655).

The spelling of 23105523 in words is "twenty-three million, one hundred five thousand, five hundred twenty-three".