218540158 has 8 divisors (see below), whose sum is σ = 342062928. Its totient is φ = 104519184.

The previous prime is 218540141. The next prime is 218540159. The reversal of 218540158 is 851045812.

218540158 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.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (218540159) 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, 2375391 + ... + 2375482.

It is an arithmetic number, because the mean of its divisors is an integer number (42757866).

Almost surely, 2^218540158 is an apocalyptic number.

218540158 is a deficient number, since it is larger than the sum of its proper divisors (123522770).

218540158 is a wasteful number, since it uses less digits than its factorization.

218540158 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4750898.

The product of its (nonzero) digits is 12800, while the sum is 34.

The square root of 218540158 is about 14783.1038012996. The cubic root of 218540158 is about 602.3428380906.

The spelling of 218540158 in words is "two hundred eighteen million, five hundred forty thousand, one hundred fifty-eight".