22205772 has 48 divisors (see below), whose sum is σ = 59137120. Its totient is φ = 7200576.

The previous prime is 22205749. The next prime is 22205773. The reversal of 22205772 is 27750222.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (22205773) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1218 + ... + 6774.

Almost surely, 2^22205772 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22205772, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29568560).

22205772 is an abundant number, since it is smaller than the sum of its proper divisors (36931348).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22205772 is a wasteful number, since it uses less digits than its factorization.

22205772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5607 (or 5599 counting only the distinct ones).

The product of its (nonzero) digits is 3920, while the sum is 27.

The square root of 22205772 is about 4712.3000753348. The cubic root of 22205772 is about 281.0748313683.

Adding to 22205772 its reverse (27750222), we get a palindrome (49955994).

The spelling of 22205772 in words is "twenty-two million, two hundred five thousand, seven hundred seventy-two".