216316899 has 14 divisors (see below), whose sum is σ = 324328076. Its totient is φ = 144210780.

The previous prime is 216316897. The next prime is 216316939. The reversal of 216316899 is 998613612.

It is a happy number.

216316899 is a `hidden beast` number, since 2 + 1 + 631 + 6 + 8 + 9 + 9 = 666.

It is not a de Polignac number, because 216316899 - 2¹ = 216316897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (216316897) 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 13 ways as a sum of consecutive naturals, for example, 147637 + ... + 149094.

Almost surely, 2^216316899 is an apocalyptic number.

216316899 is a deficient number, since it is larger than the sum of its proper divisors (108011177).

216316899 is an frugal number, since it uses more digits than its factorization.

216316899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 296749 (or 296734 counting only the distinct ones).

The product of its digits is 139968, while the sum is 45.

The square root of 216316899 is about 14707.7156282001. The cubic root of 216316899 is about 600.2932816198.

The spelling of 216316899 in words is "two hundred sixteen million, three hundred sixteen thousand, eight hundred ninety-nine".