220111218 has 48 divisors (see below), whose sum is σ = 500385600. Its totient is φ = 69830880.

The previous prime is 220111217. The next prime is 220111259. The reversal of 220111218 is 812111022.

220111218 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a self number, because there is not a number n which added to its sum of digits gives 220111218.

It is not an unprimeable number, because it can be changed into a prime (220111211) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 34093 + ... + 40031.

It is an arithmetic number, because the mean of its divisors is an integer number (10424700).

Almost surely, 2^220111218 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 220111218, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (250192800).

220111218 is an abundant number, since it is smaller than the sum of its proper divisors (280274382).

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

220111218 is a wasteful number, since it uses less digits than its factorization.

220111218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6047 (or 6044 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

The square root of 220111218 is about 14836.1456584923. The cubic root of 220111218 is about 603.7827841205.

The spelling of 220111218 in words is "two hundred twenty million, one hundred eleven thousand, two hundred eighteen".