13204224 has 108 divisors (see below), whose sum is σ = 41611752. Its totient is φ = 3993600.

The previous prime is 13204211. The next prime is 13204237. The reversal of 13204224 is 42240231.

It is an interprime number because it is at equal distance from previous prime (13204211) and next prime (13204237).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 13204197 and 13204206.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 25084 + ... + 25604.

It is an arithmetic number, because the mean of its divisors is an integer number (385294).

Almost surely, 2^13204224 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13204224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20805876).

13204224 is an abundant number, since it is smaller than the sum of its proper divisors (28407528).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13204224 is a wasteful number, since it uses less digits than its factorization.

13204224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 554 (or 537 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 13204224 is about 3633.7616872877. The cubic root of 13204224 is about 236.3583562744.

Adding to 13204224 its reverse (42240231), we get a palindrome (55444455).

The spelling of 13204224 in words is "thirteen million, two hundred four thousand, two hundred twenty-four".