13315566 has 24 divisors (see below), whose sum is σ = 29273832. Its totient is φ = 4034800.

The previous prime is 13315559. The next prime is 13315567. The reversal of 13315566 is 66551331.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13315567) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8445 + ... + 9896.

It is an arithmetic number, because the mean of its divisors is an integer number (1219743).

Almost surely, 2^13315566 is an apocalyptic number.

13315566 is an abundant number, since it is smaller than the sum of its proper divisors (15958266).

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

13315566 is a wasteful number, since it uses less digits than its factorization.

13315566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18368 (or 18357 counting only the distinct ones).

The product of its digits is 8100, while the sum is 30.

The square root of 13315566 is about 3649.0500133596. The cubic root of 13315566 is about 237.0208459650.

Adding to 13315566 its reverse (66551331), we get a palindrome (79866897).

The spelling of 13315566 in words is "thirteen million, three hundred fifteen thousand, five hundred sixty-six".