22216727 has 4 divisors (see below), whose sum is σ = 23925720. Its totient is φ = 20507736.

The previous prime is 22216673. The next prime is 22216751. The reversal of 22216727 is 72761222.

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

It is a cyclic number.

It is not a de Polignac number, because 22216727 - 2²⁰ = 21168151 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22216727.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22216927) 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, 854477 + ... + 854502.

It is an arithmetic number, because the mean of its divisors is an integer number (5981430).

Almost surely, 2^22216727 is an apocalyptic number.

22216727 is a deficient number, since it is larger than the sum of its proper divisors (1708993).

22216727 is a wasteful number, since it uses less digits than its factorization.

22216727 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1708992.

The product of its digits is 4704, while the sum is 29.

The square root of 22216727 is about 4713.4623155383. The cubic root of 22216727 is about 281.1210456071.

Adding to 22216727 its reverse (72761222), we get a palindrome (94977949).

The spelling of 22216727 in words is "twenty-two million, two hundred sixteen thousand, seven hundred twenty-seven".