22202220 has 96 divisors (see below), whose sum is σ = 65193408. Its totient is φ = 5640192.

The previous prime is 22202209. The next prime is 22202249. The reversal of 22202220 is 2220222.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 22202196 and 22202205.

It is an unprimeable number.

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, 161992 + ... + 162128.

It is an arithmetic number, because the mean of its divisors is an integer number (679098).

Almost surely, 2^22202220 is an apocalyptic number.

22202220 is a gapful number since it is divisible by the number (20) 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 22202220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32596704).

22202220 is an abundant number, since it is smaller than the sum of its proper divisors (42991188).

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

22202220 is a wasteful number, since it uses less digits than its factorization.

22202220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 259 (or 257 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 12.

The square root of 22202220 is about 4711.9231742464. The cubic root of 22202220 is about 281.0598438080.

Adding to 22202220 its reverse (2220222), we get a palindrome (24422442).

It can be divided in two parts, 22202 and 220, that added together give a palindrome (22422).

The spelling of 22202220 in words is "twenty-two million, two hundred two thousand, two hundred twenty".