218443242 has 8 divisors (see below), whose sum is σ = 436886496. Its totient is φ = 72814412.

The previous prime is 218443241. The next prime is 218443261. The reversal of 218443242 is 242344812.

218443242 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

218443242 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (218443241) 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, 18203598 + ... + 18203609.

It is an arithmetic number, because the mean of its divisors is an integer number (54610812).

Almost surely, 2^218443242 is an apocalyptic number.

218443242 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

218443242 is a wasteful number, since it uses less digits than its factorization.

218443242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36407212.

The product of its digits is 12288, while the sum is 30.

The square root of 218443242 is about 14779.8255064124. The cubic root of 218443242 is about 602.2537846025.

The spelling of 218443242 in words is "two hundred eighteen million, four hundred forty-three thousand, two hundred forty-two".