15220223 has 4 divisors (see below), whose sum is σ = 15228048. Its totient is φ = 15212400.

The previous prime is 15220193. The next prime is 15220241. The reversal of 15220223 is 32202251.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 15220223 - 2¹⁶ = 15154687 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15220243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1523 + ... + 5723.

It is an arithmetic number, because the mean of its divisors is an integer number (3807012).

Almost surely, 2^15220223 is an apocalyptic number.

15220223 is a deficient number, since it is larger than the sum of its proper divisors (7825).

15220223 is an equidigital number, since it uses as much as digits as its factorization.

15220223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7824.

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 15220223 is about 3901.3104208714. The cubic root of 15220223 is about 247.8222744610.

Adding to 15220223 its reverse (32202251), we get a palindrome (47422474).

The spelling of 15220223 in words is "fifteen million, two hundred twenty thousand, two hundred twenty-three".