218200220 has 24 divisors (see below), whose sum is σ = 523680864. Its totient is φ = 74811456.

The previous prime is 218200187. The next prime is 218200223. The reversal of 218200220 is 22002812.

It is a super-2 number, since 2×218200220² = 95222672016096800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (218200223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 779147 + ... + 779426.

It is an arithmetic number, because the mean of its divisors is an integer number (21820036).

Almost surely, 2^218200220 is an apocalyptic number.

218200220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

218200220 is an abundant number, since it is smaller than the sum of its proper divisors (305480644).

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

218200220 is a wasteful number, since it uses less digits than its factorization.

218200220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1558589 (or 1558587 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 218200220 is about 14771.6018088764. The cubic root of 218200220 is about 602.0303623719.

The spelling of 218200220 in words is "two hundred eighteen million, two hundred thousand, two hundred twenty".