15132223 has 4 divisors (see below), whose sum is σ = 15541240. Its totient is φ = 14723208.

The previous prime is 15132217. The next prime is 15132251. The reversal of 15132223 is 32223151.

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 15132223 - 2⁵ = 15132191 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 15132223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15132253) 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, 204453 + ... + 204526.

It is an arithmetic number, because the mean of its divisors is an integer number (3885310).

Almost surely, 2^15132223 is an apocalyptic number.

15132223 is a deficient number, since it is larger than the sum of its proper divisors (409017).

15132223 is an equidigital number, since it uses as much as digits as its factorization.

15132223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 409016.

The product of its digits is 360, while the sum is 19.

The square root of 15132223 is about 3890.0158097365. The cubic root of 15132223 is about 247.3437329384.

Adding to 15132223 its reverse (32223151), we get a palindrome (47355374).

The spelling of 15132223 in words is "fifteen million, one hundred thirty-two thousand, two hundred twenty-three".