218604881 has 8 divisors (see below), whose sum is σ = 238598400. Its totient is φ = 198631440.

The previous prime is 218604877. The next prime is 218604961. The reversal of 218604881 is 188406812.

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

It is a cyclic number.

It is not a de Polignac number, because 218604881 - 2² = 218604877 is a prime.

It is a super-2 number, since 2×218604881² = 95576187994048322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (218604821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26255 + ... + 33563.

It is an arithmetic number, because the mean of its divisors is an integer number (29824800).

Almost surely, 2^218604881 is an apocalyptic number.

It is an amenable number.

218604881 is a deficient number, since it is larger than the sum of its proper divisors (19993519).

218604881 is a wasteful number, since it uses less digits than its factorization.

218604881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10039.

The product of its (nonzero) digits is 24576, while the sum is 38.

The square root of 218604881 is about 14785.2927262195. The cubic root of 218604881 is about 602.4022956412.

The spelling of 218604881 in words is "two hundred eighteen million, six hundred four thousand, eight hundred eighty-one".