13222247 has 4 divisors (see below), whose sum is σ = 13229976. Its totient is φ = 13214520.

The previous prime is 13222229. The next prime is 13222267. The reversal of 13222247 is 74222231.

It is a happy number.

13222247 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 74222231 = 8501 ⋅8731.

It is a cyclic number.

It is not a de Polignac number, because 13222247 - 2²⁰ = 12173671 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13222207) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29 + ... + 5142.

It is an arithmetic number, because the mean of its divisors is an integer number (3307494).

Almost surely, 2^13222247 is an apocalyptic number.

13222247 is a deficient number, since it is larger than the sum of its proper divisors (7729).

13222247 is an equidigital number, since it uses as much as digits as its factorization.

13222247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7728.

The product of its digits is 1344, while the sum is 23.

The square root of 13222247 is about 3636.2407786064. The cubic root of 13222247 is about 236.4658458665.

Adding to 13222247 its reverse (74222231), we get a palindrome (87444478).

It can be divided in two parts, 1322224 and 7, that added together give a palindrome (1322231).

The spelling of 13222247 in words is "thirteen million, two hundred twenty-two thousand, two hundred forty-seven".