22102220 has 48 divisors (see below), whose sum is σ = 54190080. Its totient is φ = 7414464.

The previous prime is 22102217. The next prime is 22102237. The reversal of 22102220 is 2220122.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4901 + ... + 8259.

It is an arithmetic number, because the mean of its divisors is an integer number (1128960).

Almost surely, 2^22102220 is an apocalyptic number.

22102220 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 22102220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27095040).

22102220 is an abundant number, since it is smaller than the sum of its proper divisors (32087860).

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

22102220 is a wasteful number, since it uses less digits than its factorization.

22102220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3422 (or 3420 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 11.

The square root of 22102220 is about 4701.2998202625. The cubic root of 22102220 is about 280.6372391128.

Adding to 22102220 its reverse (2220122), we get a palindrome (24322342).

It can be divided in two parts, 22102 and 220, that added together give a palindrome (22322).

The spelling of 22102220 in words is "twenty-two million, one hundred two thousand, two hundred twenty".