218683242 has 12 divisors (see below), whose sum is σ = 473813730. Its totient is φ = 72894408.

The previous prime is 218683237. The next prime is 218683249. The reversal of 218683242 is 242386812.

218683242 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 113230881 + 105452361 = 10641^2 + 10269^2 .

It is a junction number, because it is equal to n+sod(n) for n = 218683197 and 218683206.

It is not an unprimeable number, because it can be changed into a prime (218683249) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6074517 + ... + 6074552.

Almost surely, 2^218683242 is an apocalyptic number.

218683242 is an abundant number, since it is smaller than the sum of its proper divisors (255130488).

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

218683242 is a wasteful number, since it uses less digits than its factorization.

218683242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12149077 (or 12149074 counting only the distinct ones).

The product of its digits is 36864, while the sum is 36.

The square root of 218683242 is about 14787.9424532286. The cubic root of 218683242 is about 602.4742659876.

The spelling of 218683242 in words is "two hundred eighteen million, six hundred eighty-three thousand, two hundred forty-two".