13530224 has 20 divisors (see below), whose sum is σ = 26301144. Its totient is φ = 6742848.

The previous prime is 13530203. The next prime is 13530259. The reversal of 13530224 is 42203531.

It is a happy number.

13530224 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×13530224² = 366133922980352, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 13530196 and 13530205.

It is a congruent number.

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, 4334 + ... + 6770.

Almost surely, 2^13530224 is an apocalyptic number.

It is an amenable number.

13530224 is a deficient number, since it is larger than the sum of its proper divisors (12770920).

13530224 is a wasteful number, since it uses less digits than its factorization.

13530224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2792 (or 2786 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 13530224 is about 3678.3452801498. The cubic root of 13530224 is about 238.2877202009.

Adding to 13530224 its reverse (42203531), we get a palindrome (55733755).

The spelling of 13530224 in words is "thirteen million, five hundred thirty thousand, two hundred twenty-four".