216539207 has 8 divisors (see below), whose sum is σ = 223076112. Its totient is φ = 210038400.

The previous prime is 216539189. The next prime is 216539221. The reversal of 216539207 is 702935612.

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 216539207 - 2²⁰ = 215490631 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216539507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3407 + ... + 21087.

It is an arithmetic number, because the mean of its divisors is an integer number (27884514).

Almost surely, 2^216539207 is an apocalyptic number.

216539207 is a deficient number, since it is larger than the sum of its proper divisors (6536905).

216539207 is a wasteful number, since it uses less digits than its factorization.

216539207 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18049.

The product of its (nonzero) digits is 22680, while the sum is 35.

The square root of 216539207 is about 14715.2712173442. The cubic root of 216539207 is about 600.4988508721.

The spelling of 216539207 in words is "two hundred sixteen million, five hundred thirty-nine thousand, two hundred seven".