23315623 has 4 divisors (see below), whose sum is σ = 24119640. Its totient is φ = 22511608.

The previous prime is 23315609. The next prime is 23315639. The reversal of 23315623 is 32651332.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23315623 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23315693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 401965 + ... + 402022.

It is an arithmetic number, because the mean of its divisors is an integer number (6029910).

Almost surely, 2^23315623 is an apocalyptic number.

23315623 is a deficient number, since it is larger than the sum of its proper divisors (804017).

23315623 is an equidigital number, since it uses as much as digits as its factorization.

23315623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 804016.

The product of its digits is 3240, while the sum is 25.

The square root of 23315623 is about 4828.6253737477. The cubic root of 23315623 is about 285.6816473312.

Adding to 23315623 its reverse (32651332), we get a palindrome (55966955).

The spelling of 23315623 in words is "twenty-three million, three hundred fifteen thousand, six hundred twenty-three".