23145815 has 32 divisors (see below), whose sum is σ = 35112960. Its totient is φ = 14227200.

The previous prime is 23145791. The next prime is 23145817. The reversal of 23145815 is 51854132.

It is a de Polignac number, because none of the positive numbers 2^k-23145815 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23145817) 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 31 ways as a sum of consecutive naturals, for example, 30035 + ... + 30795.

It is an arithmetic number, because the mean of its divisors is an integer number (1097280).

Almost surely, 2^23145815 is an apocalyptic number.

23145815 is a deficient number, since it is larger than the sum of its proper divisors (11967145).

23145815 is a wasteful number, since it uses less digits than its factorization.

23145815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 863.

The product of its digits is 4800, while the sum is 29.

The square root of 23145815 is about 4811.0097692688. The cubic root of 23145815 is about 284.9864156858.

Adding to 23145815 its reverse (51854132), we get a palindrome (74999947).

The spelling of 23145815 in words is "twenty-three million, one hundred forty-five thousand, eight hundred fifteen".