220100220 has 96 divisors (see below), whose sum is σ = 688564800. Its totient is φ = 58367232.

The previous prime is 220100171. The next prime is 220100291. The reversal of 220100220 is 22001022.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 105346 + ... + 107414.

It is an arithmetic number, because the mean of its divisors is an integer number (7172550).

Almost surely, 2^220100220 is an apocalyptic number.

220100220 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 220100220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (344282400).

220100220 is an abundant number, since it is smaller than the sum of its proper divisors (468464580).

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

220100220 is a wasteful number, since it uses less digits than its factorization.

220100220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2284 (or 2276 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 9.

The square root of 220100220 is about 14835.7750050343. The cubic root of 220100220 is about 603.7727278200.

Adding to 220100220 its reverse (22001022), we get a palindrome (242101242).

It can be divided in two parts, 2201002 and 20, that added together give a palindrome (2201022).

The spelling of 220100220 in words is "two hundred twenty million, one hundred thousand, two hundred twenty".