15072224 has 12 divisors (see below), whose sum is σ = 29673504. Its totient is φ = 7536096.

The previous prime is 15072223. The next prime is 15072229. The reversal of 15072224 is 42227051.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 15072224.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15072223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 235472 + ... + 235535.

It is an arithmetic number, because the mean of its divisors is an integer number (2472792).

Almost surely, 2^15072224 is an apocalyptic number.

It is an amenable number.

15072224 is a deficient number, since it is larger than the sum of its proper divisors (14601280).

15072224 is an equidigital number, since it uses as much as digits as its factorization.

15072224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 471017 (or 471009 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 23.

The square root of 15072224 is about 3882.2962277498. The cubic root of 15072224 is about 247.0163953996.

Adding to 15072224 its reverse (42227051), we get a palindrome (57299275).

The spelling of 15072224 in words is "fifteen million, seventy-two thousand, two hundred twenty-four".