220218220 has 24 divisors (see below), whose sum is σ = 462873600. Its totient is φ = 88008192.

The previous prime is 220218217. The next prime is 220218239. The reversal of 220218220 is 22812022.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21276 + ... + 29884.

It is an arithmetic number, because the mean of its divisors is an integer number (19286400).

Almost surely, 2^220218220 is an apocalyptic number.

220218220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

220218220 is an abundant number, since it is smaller than the sum of its proper divisors (242655380).

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

220218220 is a wasteful number, since it uses less digits than its factorization.

220218220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9897 (or 9895 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 19.

The square root of 220218220 is about 14839.7513456257. The cubic root of 220218220 is about 603.8806066364.

The spelling of 220218220 in words is "two hundred twenty million, two hundred eighteen thousand, two hundred twenty".