216286256 has 20 divisors (see below), whose sum is σ = 432573504. Its totient is φ = 104654400.

The previous prime is 216286249. The next prime is 216286261. The reversal of 216286256 is 652682612.

216286256 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 217535 + ... + 218526.

Almost surely, 2^216286256 is an apocalyptic number.

It is an amenable number.

216286256 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

216286256 is a wasteful number, since it uses less digits than its factorization.

216286256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 436100 (or 436094 counting only the distinct ones).

The product of its digits is 69120, while the sum is 38.

The square root of 216286256 is about 14706.6738591702. The cubic root of 216286256 is about 600.2649348505.

The spelling of 216286256 in words is "two hundred sixteen million, two hundred eighty-six thousand, two hundred fifty-six".