22221108 has 288 divisors, whose sum is σ = 80438400. Its totient is φ = 5225472.

The previous prime is 22221097. The next prime is 22221109. The reversal of 22221108 is 80112222.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22221109) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1169523 + ... + 1169541.

It is an arithmetic number, because the mean of its divisors is an integer number (279300).

Almost surely, 2^22221108 is an apocalyptic number.

22221108 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22221108, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40219200).

22221108 is an abundant number, since it is smaller than the sum of its proper divisors (58217292).

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

22221108 is a wasteful number, since it uses less digits than its factorization.

22221108 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76 (or 61 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

The square root of 22221108 is about 4713.9270253155. The cubic root of 22221108 is about 281.1395228316.

The spelling of 22221108 in words is "twenty-two million, two hundred twenty-one thousand, one hundred eight".