13613224 has 8 divisors (see below), whose sum is σ = 25524810. Its totient is φ = 6806608.

The previous prime is 13613207. The next prime is 13613227. The reversal of 13613224 is 42231631.

It can be written as a sum of positive squares in only one way, i.e., 7452900 + 6160324 = 2730^2 + 2482^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 13613195 and 13613204.

It is not an unprimeable number, because it can be changed into a prime (13613227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 850819 + ... + 850834.

Almost surely, 2^13613224 is an apocalyptic number.

It is an amenable number.

13613224 is a deficient number, since it is larger than the sum of its proper divisors (11911586).

13613224 is a wasteful number, since it uses less digits than its factorization.

13613224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1701659 (or 1701655 counting only the distinct ones).

The product of its digits is 864, while the sum is 22.

The square root of 13613224 is about 3689.6102775225. The cubic root of 13613224 is about 238.7739791162.

Adding to 13613224 its reverse (42231631), we get a palindrome (55844855).

The spelling of 13613224 in words is "thirteen million, six hundred thirteen thousand, two hundred twenty-four".