216799716 has 72 divisors (see below), whose sum is σ = 590864736. Its totient is φ = 61689600.

The previous prime is 216799703. The next prime is 216799717. The reversal of 216799716 is 617997612.

It is a happy number.

216799716 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (216799717) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 179916 + ... + 181116.

Almost surely, 2^216799716 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 216799716, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (295432368).

216799716 is an abundant number, since it is smaller than the sum of its proper divisors (374065020).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

216799716 is a wasteful number, since it uses less digits than its factorization.

216799716 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1529 (or 1520 counting only the distinct ones).

The product of its digits is 285768, while the sum is 48.

The square root of 216799716 is about 14724.1202114082. The cubic root of 216799716 is about 600.7395658073.

The spelling of 216799716 in words is "two hundred sixteen million, seven hundred ninety-nine thousand, seven hundred sixteen".