218432089 has 12 divisors (see below), whose sum is σ = 227644560. Its totient is φ = 209577200.

The previous prime is 218432083. The next prime is 218432117. The reversal of 218432089 is 980234812.

It is not a de Polignac number, because 218432089 - 2⁵ = 218432057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (218432083) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 149814 + ... + 151264.

It is an arithmetic number, because the mean of its divisors is an integer number (18970380).

Almost surely, 2^218432089 is an apocalyptic number.

218432089 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

218432089 is a deficient number, since it is larger than the sum of its proper divisors (9212471).

218432089 is a wasteful number, since it uses less digits than its factorization.

218432089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1688 (or 1659 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 37.

The square root of 218432089 is about 14779.4481967359. The cubic root of 218432089 is about 602.2435347230.

It can be divided in two parts, 21843 and 2089, that added together give a palindrome (23932).

The spelling of 218432089 in words is "two hundred eighteen million, four hundred thirty-two thousand, eighty-nine".