22222266 has 32 divisors (see below), whose sum is σ = 48945600. Its totient is φ = 6670080.

The previous prime is 22222261. The next prime is 22222273. The reversal of 22222266 is 66222222.

It is a nude number because it is divisible by every one of its digits.

It is a plaindrome in base 10.

It is a zygodrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (22222261) 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 15 ways as a sum of consecutive naturals, for example, 5650 + ... + 8738.

It is an arithmetic number, because the mean of its divisors is an integer number (1529550).

Almost surely, 2^22222266 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22222266, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24472800).

22222266 is an abundant number, since it is smaller than the sum of its proper divisors (26723334).

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

22222266 is a wasteful number, since it uses less digits than its factorization.

22222266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3214.

The product of its digits is 2304, while the sum is 24.

The square root of 22222266 is about 4714.0498512426. The cubic root of 22222266 is about 281.1444063852.

Adding to 22222266 its reverse (66222222), we get a palindrome (88444488).

The spelling of 22222266 in words is "twenty-two million, two hundred twenty-two thousand, two hundred sixty-six".