218228322 has 32 divisors (see below), whose sum is σ = 481501440. Its totient is φ = 65508480.

The previous prime is 218228321. The next prime is 218228323. The reversal of 218228322 is 223822812.

It is an interprime number because it is at equal distance from previous prime (218228321) and next prime (218228323).

It is a self number, because there is not a number n which added to its sum of digits gives 218228322.

It is not an unprimeable number, because it can be changed into a prime (218228321) 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, 30922 + ... + 37317.

It is an arithmetic number, because the mean of its divisors is an integer number (15046920).

Almost surely, 2^218228322 is an apocalyptic number.

218228322 is an abundant number, since it is smaller than the sum of its proper divisors (263273118).

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

218228322 is a wasteful number, since it uses less digits than its factorization.

218228322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68298.

The product of its digits is 6144, while the sum is 30.

The square root of 218228322 is about 14772.5529953356. The cubic root of 218228322 is about 602.0562064201.

The spelling of 218228322 in words is "two hundred eighteen million, two hundred twenty-eight thousand, three hundred twenty-two".