219055985 has 8 divisors (see below), whose sum is σ = 262983336. Its totient is φ = 175167360.

The previous prime is 219055961. The next prime is 219056003. The reversal of 219055985 is 589550912.

219055985 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 145250704 + 73805281 = 12052^2 + 8591^2 .

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

It is not a de Polignac number, because 219055985 - 2²² = 214861681 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4715 + ... + 21455.

It is an arithmetic number, because the mean of its divisors is an integer number (32872917).

Almost surely, 2^219055985 is an apocalyptic number.

It is an amenable number.

219055985 is a deficient number, since it is larger than the sum of its proper divisors (43927351).

219055985 is a wasteful number, since it uses less digits than its factorization.

219055985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19363.

The product of its (nonzero) digits is 162000, while the sum is 44.

The square root of 219055985 is about 14800.5400239316. The cubic root of 219055985 is about 602.8163751082.

The spelling of 219055985 in words is "two hundred nineteen million, fifty-five thousand, nine hundred eighty-five".