216686201 has 8 divisors (see below), whose sum is σ = 219609600. Its totient is φ = 213780672.

The previous prime is 216686179. The next prime is 216686221. The reversal of 216686201 is 102686612.

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

It is a cyclic number.

It is not a de Polignac number, because 216686201 - 2⁶ = 216686137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (216686221) 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 7 ways as a sum of consecutive naturals, for example, 20900 + ... + 29498.

It is an arithmetic number, because the mean of its divisors is an integer number (27451200).

Almost surely, 2^216686201 is an apocalyptic number.

It is an amenable number.

216686201 is a deficient number, since it is larger than the sum of its proper divisors (2923399).

216686201 is a wasteful number, since it uses less digits than its factorization.

216686201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8935.

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 216686201 is about 14720.2649772346. The cubic root of 216686201 is about 600.6346996535.

The spelling of 216686201 in words is "two hundred sixteen million, six hundred eighty-six thousand, two hundred one".