216078647 has 2 divisors, whose sum is σ = 216078648. Its totient is φ = 216078646.

The previous prime is 216078641. The next prime is 216078673. The reversal of 216078647 is 746870612.

216078647 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 216078647 - 2¹⁴ = 216062263 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (216078641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108039323 + 108039324.

It is an arithmetic number, because the mean of its divisors is an integer number (108039324).

Almost surely, 2^216078647 is an apocalyptic number.

216078647 is a deficient number, since it is larger than the sum of its proper divisors (1).

216078647 is an equidigital number, since it uses as much as digits as its factorization.

216078647 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 112896, while the sum is 41.

The square root of 216078647 is about 14699.6138384653. The cubic root of 216078647 is about 600.0728124598.

The spelling of 216078647 in words is "two hundred sixteen million, seventy-eight thousand, six hundred forty-seven".