13222229 has 2 divisors, whose sum is σ = 13222230. Its totient is φ = 13222228.

The previous prime is 13222207. The next prime is 13222267. The reversal of 13222229 is 92222231.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13126129 + 96100 = 3623^2 + 310^2 .

It is an emirp because it is prime and its reverse (92222231) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13222229 - 2²⁰ = 12173653 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13222129) by changing a digit.

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, 6611114 + 6611115.

It is an arithmetic number, because the mean of its divisors is an integer number (6611115).

Almost surely, 2^13222229 is an apocalyptic number.

It is an amenable number.

13222229 is a deficient number, since it is larger than the sum of its proper divisors (1).

13222229 is an equidigital number, since it uses as much as digits as its factorization.

13222229 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 864, while the sum is 23.

The square root of 13222229 is about 3636.2383035219. The cubic root of 13222229 is about 236.4657385629.

It can be divided in two parts, 1322222 and 9, that added together give a palindrome (1322231).

The spelling of 13222229 in words is "thirteen million, two hundred twenty-two thousand, two hundred twenty-nine".