216215568 has 160 divisors (see below), whose sum is σ = 649125120. Its totient is φ = 69704064.

The previous prime is 216215563. The next prime is 216215569. The reversal of 216215568 is 865512612.

216215568 is a `hidden beast` number, since 21 + 62 + 15 + 568 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (216215563) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1294621 + ... + 1294787.

It is an arithmetic number, because the mean of its divisors is an integer number (4057032).

Almost surely, 2^216215568 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 216215568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (324562560).

216215568 is an abundant number, since it is smaller than the sum of its proper divisors (432909552).

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

216215568 is an equidigital number, since it uses as much as digits as its factorization.

216215568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233 (or 209 counting only the distinct ones).

The product of its digits is 28800, while the sum is 36.

The square root of 216215568 is about 14704.2704001253. The cubic root of 216215568 is about 600.1995336365.

The spelling of 216215568 in words is "two hundred sixteen million, two hundred fifteen thousand, five hundred sixty-eight".