218044220 has 12 divisors (see below), whose sum is σ = 457892904. Its totient is φ = 87217680.

The previous prime is 218044201. The next prime is 218044223. The reversal of 218044220 is 22440812.

It is a happy number.

It is a hoax number, since the sum of its digits (23) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (218044223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5451086 + ... + 5451125.

It is an arithmetic number, because the mean of its divisors is an integer number (38157742).

Almost surely, 2^218044220 is an apocalyptic number.

218044220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

218044220 is an abundant number, since it is smaller than the sum of its proper divisors (239848684).

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

218044220 is a wasteful number, since it uses less digits than its factorization.

218044220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10902220 (or 10902218 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 23.

The square root of 218044220 is about 14766.3204624578. The cubic root of 218044220 is about 601.8868563647.

The spelling of 218044220 in words is "two hundred eighteen million, forty-four thousand, two hundred twenty".