218483881 has 16 divisors (see below), whose sum is σ = 288420480. Its totient is φ = 160231680.

The previous prime is 218483873. The next prime is 218483887. The reversal of 218483881 is 188384812.

It is not a de Polignac number, because 218483881 - 2³ = 218483873 is a prime.

It is a super-2 number, since 2×218483881² = 95470412513644322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (218483887) 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 15 ways as a sum of consecutive naturals, for example, 82146 + ... + 84763.

It is an arithmetic number, because the mean of its divisors is an integer number (18026280).

Almost surely, 2^218483881 is an apocalyptic number.

It is an amenable number.

218483881 is a deficient number, since it is larger than the sum of its proper divisors (69936599).

218483881 is a wasteful number, since it uses less digits than its factorization.

218483881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166944.

The product of its digits is 98304, while the sum is 43.

The square root of 218483881 is about 14781.2002557302. The cubic root of 218483881 is about 602.2911298853.

The spelling of 218483881 in words is "two hundred eighteen million, four hundred eighty-three thousand, eight hundred eighty-one".