218255442 has 16 divisors (see below), whose sum is σ = 437833632. Its totient is φ = 72531360.

The previous prime is 218255393. The next prime is 218255447. The reversal of 218255442 is 244552812.

218255442 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (218255447) 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, 52963 + ... + 56934.

It is an arithmetic number, because the mean of its divisors is an integer number (27364602).

Almost surely, 2^218255442 is an apocalyptic number.

218255442 is an abundant number, since it is smaller than the sum of its proper divisors (219578190).

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

218255442 is a wasteful number, since it uses less digits than its factorization.

218255442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110233.

The product of its digits is 25600, while the sum is 33.

The square root of 218255442 is about 14773.4708853404. The cubic root of 218255442 is about 602.0811452668.

The spelling of 218255442 in words is "two hundred eighteen million, two hundred fifty-five thousand, four hundred forty-two".