13220616 has 16 divisors (see below), whose sum is σ = 33051600. Its totient is φ = 4406864.

The previous prime is 13220609. The next prime is 13220629. The reversal of 13220616 is 61602231.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 13220592 and 13220601.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 275406 + ... + 275453.

It is an arithmetic number, because the mean of its divisors is an integer number (2065725).

Almost surely, 2^13220616 is an apocalyptic number.

It is an amenable number.

13220616 is an abundant number, since it is smaller than the sum of its proper divisors (19830984).

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

13220616 is a wasteful number, since it uses less digits than its factorization.

13220616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 550868 (or 550864 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 13220616 is about 3636.0165016127. The cubic root of 13220616 is about 236.4561225657.

Adding to 13220616 its reverse (61602231), we get a palindrome (74822847).

The spelling of 13220616 in words is "thirteen million, two hundred twenty thousand, six hundred sixteen".