2208220220 has 24 divisors (see below), whose sum is σ = 4657174704. Its totient is φ = 879495296.

The previous prime is 2208220213. The next prime is 2208220291. The reversal of 2208220220 is 220228022.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 2208220192 and 2208220201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 232274 + ... + 241593.

It is an arithmetic number, because the mean of its divisors is an integer number (194048946).

Almost surely, 2^2208220220 is an apocalyptic number.

2208220220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2208220220 is an abundant number, since it is smaller than the sum of its proper divisors (2448954484).

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

2208220220 is a wasteful number, since it uses less digits than its factorization.

2208220220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 474109 (or 474107 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 20.

The square root of 2208220220 is about 46991.7037358724. The cubic root of 2208220220 is about 1302.2093043818.

Adding to 2208220220 its reverse (220228022), we get a palindrome (2428448242).

The spelling of 2208220220 in words is "two billion, two hundred eight million, two hundred twenty thousand, two hundred twenty".