218871089 has 8 divisors (see below), whose sum is σ = 230687040. Its totient is φ = 207084816.

The previous prime is 218871077. The next prime is 218871119. The reversal of 218871089 is 980178812.

218871089 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 cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-218871089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (218871049) 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, 8639 + ... + 22635.

It is an arithmetic number, because the mean of its divisors is an integer number (28835880).

Almost surely, 2^218871089 is an apocalyptic number.

It is an amenable number.

218871089 is a deficient number, since it is larger than the sum of its proper divisors (11815951).

218871089 is a wasteful number, since it uses less digits than its factorization.

218871089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14839.

The product of its (nonzero) digits is 64512, while the sum is 44.

The square root of 218871089 is about 14794.2924467512. The cubic root of 218871089 is about 602.6467233328.

The spelling of 218871089 in words is "two hundred eighteen million, eight hundred seventy-one thousand, eighty-nine".