15138224 has 20 divisors (see below), whose sum is σ = 29425200. Its totient is φ = 7544640.

The previous prime is 15138197. The next prime is 15138239. The reversal of 15138224 is 42283151.

It is a junction number, because it is equal to n+sod(n) for n = 15138193 and 15138202.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4229 + ... + 6939.

It is an arithmetic number, because the mean of its divisors is an integer number (1471260).

Almost surely, 2^15138224 is an apocalyptic number.

It is an amenable number.

15138224 is a deficient number, since it is larger than the sum of its proper divisors (14286976).

15138224 is a wasteful number, since it uses less digits than its factorization.

15138224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3068 (or 3062 counting only the distinct ones).

The product of its digits is 1920, while the sum is 26.

The square root of 15138224 is about 3890.7870669056. The cubic root of 15138224 is about 247.3764250633.

The spelling of 15138224 in words is "fifteen million, one hundred thirty-eight thousand, two hundred twenty-four".