216308286 has 32 divisors (see below), whose sum is σ = 482630400. Its totient is φ = 71811000.

The previous prime is 216308273. The next prime is 216308347. The reversal of 216308286 is 682803612.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 216308286.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5575 + ... + 21533.

It is an arithmetic number, because the mean of its divisors is an integer number (15082200).

Almost surely, 2^216308286 is an apocalyptic number.

216308286 is an abundant number, since it is smaller than the sum of its proper divisors (266322114).

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

216308286 is a wasteful number, since it uses less digits than its factorization.

216308286 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16221 (or 16215 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The square root of 216308286 is about 14707.4228197873. The cubic root of 216308286 is about 600.2853143047.

The spelling of 216308286 in words is "two hundred sixteen million, three hundred eight thousand, two hundred eighty-six".