15522223 has 4 divisors (see below), whose sum is σ = 15696720. Its totient is φ = 15347728.

The previous prime is 15522197. The next prime is 15522239. The reversal of 15522223 is 32222551.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32222551 = 281 ⋅114671.

It is a cyclic number.

It is not a de Polignac number, because 15522223 - 2⁵ = 15522191 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 15522194 and 15522203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15522253) 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, 87115 + ... + 87292.

It is an arithmetic number, because the mean of its divisors is an integer number (3924180).

Almost surely, 2^15522223 is an apocalyptic number.

15522223 is a deficient number, since it is larger than the sum of its proper divisors (174497).

15522223 is an equidigital number, since it uses as much as digits as its factorization.

15522223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174496.

The product of its digits is 1200, while the sum is 22.

The square root of 15522223 is about 3939.8252499318. The cubic root of 15522223 is about 249.4506497414.

Adding to 15522223 its reverse (32222551), we get a palindrome (47744774).

The spelling of 15522223 in words is "fifteen million, five hundred twenty-two thousand, two hundred twenty-three".