13221567 has 12 divisors (see below), whose sum is σ = 19411704. Its totient is φ = 8669520.

The previous prime is 13221553. The next prime is 13221577. The reversal of 13221567 is 76512231.

It is a happy number.

It is not a de Polignac number, because 13221567 - 2⁶ = 13221503 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 13221567.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13221577) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11493 + ... + 12590.

It is an arithmetic number, because the mean of its divisors is an integer number (1617642).

Almost surely, 2^13221567 is an apocalyptic number.

13221567 is a deficient number, since it is larger than the sum of its proper divisors (6190137).

13221567 is a wasteful number, since it uses less digits than its factorization.

13221567 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24150 (or 24147 counting only the distinct ones).

The product of its digits is 2520, while the sum is 27.

The square root of 13221567 is about 3636.1472742451. The cubic root of 13221567 is about 236.4617921044.

Adding to 13221567 its reverse (76512231), we get a palindrome (89733798).

The spelling of 13221567 in words is "thirteen million, two hundred twenty-one thousand, five hundred sixty-seven".