217011916 has 12 divisors (see below), whose sum is σ = 414295560. Its totient is φ = 98641760.

The previous prime is 217011881. The next prime is 217011917. The reversal of 217011916 is 619110712.

It is not an unprimeable number, because it can be changed into a prime (217011917) 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, 2466001 + ... + 2466088.

It is an arithmetic number, because the mean of its divisors is an integer number (34524630).

Almost surely, 2^217011916 is an apocalyptic number.

It is an amenable number.

217011916 is a deficient number, since it is larger than the sum of its proper divisors (197283644).

217011916 is a wasteful number, since it uses less digits than its factorization.

217011916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4932104 (or 4932102 counting only the distinct ones).

The product of its (nonzero) digits is 756, while the sum is 28.

The square root of 217011916 is about 14731.3243124982. The cubic root of 217011916 is about 600.9354999011.

The spelling of 217011916 in words is "two hundred seventeen million, eleven thousand, nine hundred sixteen".