220212220 has 72 divisors (see below), whose sum is σ = 507507840. Its totient is φ = 80163840.

The previous prime is 220212217. The next prime is 220212221. The reversal of 220212220 is 22212022.

220212220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 220212220.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220212221) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 178566 + ... + 179794.

It is an arithmetic number, because the mean of its divisors is an integer number (7048720).

Almost surely, 2^220212220 is an apocalyptic number.

220212220 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 220212220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (253753920).

220212220 is an abundant number, since it is smaller than the sum of its proper divisors (287295620).

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

220212220 is a wasteful number, since it uses less digits than its factorization.

220212220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1303 (or 1284 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 13.

The square root of 220212220 is about 14839.5491845271. The cubic root of 220212220 is about 603.8751222030.

Adding to 220212220 its reverse (22212022), we get a palindrome (242424242).

The spelling of 220212220 in words is "two hundred twenty million, two hundred twelve thousand, two hundred twenty".