23423515 has 4 divisors (see below), whose sum is σ = 28108224. Its totient is φ = 18738808.

The previous prime is 23423489. The next prime is 23423527. The reversal of 23423515 is 51532432.

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 23423515 - 2⁵ = 23423483 is a prime.

It is a super-2 number, since 2×23423515² = 1097322109910450, which contains 22 as substring.

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 23423515.

It is an unprimeable number.

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, 2342347 + ... + 2342356.

It is an arithmetic number, because the mean of its divisors is an integer number (7027056).

Almost surely, 2^23423515 is an apocalyptic number.

23423515 is a deficient number, since it is larger than the sum of its proper divisors (4684709).

23423515 is an equidigital number, since it uses as much as digits as its factorization.

23423515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4684708.

The product of its digits is 3600, while the sum is 25.

The square root of 23423515 is about 4839.7846026450. The cubic root of 23423515 is about 286.1216290335.

Adding to 23423515 its reverse (51532432), we get a palindrome (74955947).

The spelling of 23423515 in words is "twenty-three million, four hundred twenty-three thousand, five hundred fifteen".