15223423 has 4 divisors (see below), whose sum is σ = 15594768. Its totient is φ = 14852080.

The previous prime is 15223399. The next prime is 15223433. The reversal of 15223423 is 32432251.

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 15223423 - 2²¹ = 13126271 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 15223394 and 15223403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15223433) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 185611 + ... + 185692.

It is an arithmetic number, because the mean of its divisors is an integer number (3898692).

Almost surely, 2^15223423 is an apocalyptic number.

15223423 is a deficient number, since it is larger than the sum of its proper divisors (371345).

15223423 is an equidigital number, since it uses as much as digits as its factorization.

15223423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 371344.

The product of its digits is 1440, while the sum is 22.

The square root of 15223423 is about 3901.7205179254. The cubic root of 15223423 is about 247.8396411735.

Adding to 15223423 its reverse (32432251), we get a palindrome (47655674).

The spelling of 15223423 in words is "fifteen million, two hundred twenty-three thousand, four hundred twenty-three".