216188017 has 12 divisors (see below), whose sum is σ = 233304064. Its totient is φ = 200102760.

The previous prime is 216188009. The next prime is 216188083. The reversal of 216188017 is 710881612.

It is not a de Polignac number, because 216188017 - 2³ = 216188009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (216188617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9808 + ... + 22990.

Almost surely, 2^216188017 is an apocalyptic number.

It is an amenable number.

216188017 is a deficient number, since it is larger than the sum of its proper divisors (17116047).

216188017 is a wasteful number, since it uses less digits than its factorization.

216188017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13260 (or 13237 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 34.

The square root of 216188017 is about 14703.3335335903. Note that the first 3 decimals coincide. The cubic root of 216188017 is about 600.1740393271.

The spelling of 216188017 in words is "two hundred sixteen million, one hundred eighty-eight thousand, seventeen".