23123815 has 16 divisors (see below), whose sum is σ = 32600736. Its totient is φ = 15523200.

The previous prime is 23123813. The next prime is 23123827. The reversal of 23123815 is 51832132.

It is not a de Polignac number, because 23123815 - 2¹ = 23123813 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 23123815.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23123813) 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, 15456 + ... + 16885.

It is an arithmetic number, because the mean of its divisors is an integer number (2037546).

Almost surely, 2^23123815 is an apocalyptic number.

23123815 is a deficient number, since it is larger than the sum of its proper divisors (9476921).

23123815 is a wasteful number, since it uses less digits than its factorization.

23123815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32370.

The product of its digits is 1440, while the sum is 25.

The square root of 23123815 is about 4808.7228034063. The cubic root of 23123815 is about 284.8960942657.

Adding to 23123815 its reverse (51832132), we get a palindrome (74955947).

The spelling of 23123815 in words is "twenty-three million, one hundred twenty-three thousand, eight hundred fifteen".