216313216 has 32 divisors (see below), whose sum is σ = 492500880. Its totient is φ = 92705280.

The previous prime is 216313127. The next prime is 216313217. The reversal of 216313216 is 612313612.

216313216 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216313217) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 119815 + ... + 121606.

Almost surely, 2^216313216 is an apocalyptic number.

It is an amenable number.

216313216 is an abundant number, since it is smaller than the sum of its proper divisors (276187664).

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

216313216 is an equidigital number, since it uses as much as digits as its factorization.

216313216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241442 (or 241430 counting only the distinct ones).

The product of its digits is 1296, while the sum is 25.

The square root of 216313216 is about 14707.5904212757. The cubic root of 216313216 is about 600.2898747466.

Adding to 216313216 its reverse (612313612), we get a palindrome (828626828).

The spelling of 216313216 in words is "two hundred sixteen million, three hundred thirteen thousand, two hundred sixteen".