218055378 has 8 divisors (see below), whose sum is σ = 436110768. Its totient is φ = 72685124.

The previous prime is 218055377. The next prime is 218055491. The reversal of 218055378 is 873550812.

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

218055378 is an admirable number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (218055371) 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, 18171276 + ... + 18171287.

It is an arithmetic number, because the mean of its divisors is an integer number (54513846).

Almost surely, 2^218055378 is an apocalyptic number.

218055378 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.

218055378 is a wasteful number, since it uses less digits than its factorization.

218055378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36342568.

The product of its (nonzero) digits is 67200, while the sum is 39.

The square root of 218055378 is about 14766.6982768661. The cubic root of 218055378 is about 601.8971229962.

The spelling of 218055378 in words is "two hundred eighteen million, fifty-five thousand, three hundred seventy-eight".