218271080 has 16 divisors (see below), whose sum is σ = 491110020. Its totient is φ = 87308416.

The previous prime is 218271077. The next prime is 218271101. The reversal of 218271080 is 80172812.

It can be written as a sum of positive squares in 2 ways, for example, as 218271076 + 4 = 14774^2 + 2^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2728349 + ... + 2728428.

Almost surely, 2^218271080 is an apocalyptic number.

218271080 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

218271080 is an abundant number, since it is smaller than the sum of its proper divisors (272838940).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

218271080 is a wasteful number, since it uses less digits than its factorization.

218271080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5456788 (or 5456784 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 29.

The square root of 218271080 is about 14774.0001353730. Note that the first 3 decimals coincide. The cubic root of 218271080 is about 602.0955246258.

The spelling of 218271080 in words is "two hundred eighteen million, two hundred seventy-one thousand, eighty".