22115226 has 64 divisors (see below), whose sum is σ = 53268480. Its totient is φ = 5987520.

The previous prime is 22115209. The next prime is 22115227. The reversal of 22115226 is 62251122.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (22115227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 81471 + ... + 81741.

It is an arithmetic number, because the mean of its divisors is an integer number (832320).

Almost surely, 2^22115226 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22115226, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26634240).

22115226 is an abundant number, since it is smaller than the sum of its proper divisors (31153254).

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

22115226 is a wasteful number, since it uses less digits than its factorization.

22115226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 379.

The product of its digits is 480, while the sum is 21.

The square root of 22115226 is about 4702.6828513095. The cubic root of 22115226 is about 280.6922750961.

Adding to 22115226 its reverse (62251122), we get a palindrome (84366348).

The spelling of 22115226 in words is "twenty-two million, one hundred fifteen thousand, two hundred twenty-six".