13226566 has 4 divisors (see below), whose sum is σ = 19839852. Its totient is φ = 6613282.

The previous prime is 13226531. The next prime is 13226579. The reversal of 13226566 is 66562231.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

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 as a sum of consecutive naturals, namely, 3306640 + ... + 3306643.

It is an arithmetic number, because the mean of its divisors is an integer number (4959963).

Almost surely, 2^13226566 is an apocalyptic number.

13226566 is a deficient number, since it is larger than the sum of its proper divisors (6613286).

13226566 is an equidigital number, since it uses as much as digits as its factorization.

13226566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6613285.

The product of its digits is 12960, while the sum is 31.

The square root of 13226566 is about 3636.8346126817. The cubic root of 13226566 is about 236.4915899731.

Adding to 13226566 its reverse (66562231), we get a palindrome (79788797).

The spelling of 13226566 in words is "thirteen million, two hundred twenty-six thousand, five hundred sixty-six".