218620220 has 48 divisors (see below), whose sum is σ = 565053888. Its totient is φ = 69189120.

The previous prime is 218620211. The next prime is 218620229. The reversal of 218620220 is 22026812.

218620220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (218620211) and next prime (218620229).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (218620229) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 58241 + ... + 61880.

It is an arithmetic number, because the mean of its divisors is an integer number (11771956).

Almost surely, 2^218620220 is an apocalyptic number.

218620220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

218620220 is an abundant number, since it is smaller than the sum of its proper divisors (346433668).

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

218620220 is a wasteful number, since it uses less digits than its factorization.

218620220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120150 (or 120148 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 23.

The square root of 218620220 is about 14785.8114420548. The cubic root of 218620220 is about 602.4163850379.

The spelling of 218620220 in words is "two hundred eighteen million, six hundred twenty thousand, two hundred twenty".