216343616 has 28 divisors (see below), whose sum is σ = 433570380. Its totient is φ = 107097600.

The previous prime is 216343613. The next prime is 216343639. The reversal of 216343616 is 616343612.

216343616 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 150798400 + 65545216 = 12280^2 + 8096^2 .

It is a Harshad number since it is a multiple of its sum of digits (32).

It is an alternating number because its digits alternate between even and odd.

It is not an unprimeable number, because it can be changed into a prime (216343613) 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, 10271 + ... + 23198.

Almost surely, 2^216343616 is an apocalyptic number.

It is an amenable number.

216343616 is an abundant number, since it is smaller than the sum of its proper divisors (217226764).

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

216343616 is a wasteful number, since it uses less digits than its factorization.

216343616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33582 (or 33572 counting only the distinct ones).

The product of its digits is 15552, while the sum is 32.

The square root of 216343616 is about 14708.6238649304. The cubic root of 216343616 is about 600.3179943991.

The spelling of 216343616 in words is "two hundred sixteen million, three hundred forty-three thousand, six hundred sixteen".