23205523 has 4 divisors (see below), whose sum is σ = 25315128. Its totient is φ = 21095920.

The previous prime is 23205521. The next prime is 23205541. The reversal of 23205523 is 32550232.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 23205523 - 2¹ = 23205521 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23205494 and 23205503.

It is not an unprimeable number, because it can be changed into a prime (23205521) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 1054786 + ... + 1054807.

It is an arithmetic number, because the mean of its divisors is an integer number (6328782).

Almost surely, 2^23205523 is an apocalyptic number.

23205523 is a deficient number, since it is larger than the sum of its proper divisors (2109605).

23205523 is a wasteful number, since it uses less digits than its factorization.

23205523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2109604.

The product of its (nonzero) digits is 1800, while the sum is 22.

The square root of 23205523 is about 4817.2111226310. The cubic root of 23205523 is about 285.2312599210.

Adding to 23205523 its reverse (32550232), we get a palindrome (55755755).

The spelling of 23205523 in words is "twenty-three million, two hundred five thousand, five hundred twenty-three".