217345852 has 12 divisors (see below), whose sum is σ = 386802360. Its totient is φ = 106830896.

The previous prime is 217345847. The next prime is 217345859. The reversal of 217345852 is 258543712.

217345852 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (217345859) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 460243 + ... + 460714.

It is an arithmetic number, because the mean of its divisors is an integer number (32233530).

Almost surely, 2^217345852 is an apocalyptic number.

It is an amenable number.

217345852 is a deficient number, since it is larger than the sum of its proper divisors (169456508).

217345852 is a wasteful number, since it uses less digits than its factorization.

217345852 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 921020 (or 921018 counting only the distinct ones).

The product of its digits is 67200, while the sum is 37.

The square root of 217345852 is about 14742.6541708066. The cubic root of 217345852 is about 601.2435799932.

The spelling of 217345852 in words is "two hundred seventeen million, three hundred forty-five thousand, eight hundred fifty-two".