216303966 has 32 divisors (see below), whose sum is σ = 481773600. Its totient is φ = 71936640.

The previous prime is 216303949. The next prime is 216303973. The reversal of 216303966 is 669303612.

216303966 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 216303966.

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, 20550 + ... + 29238.

It is an arithmetic number, because the mean of its divisors is an integer number (15055425).

Almost surely, 2^216303966 is an apocalyptic number.

216303966 is an abundant number, since it is smaller than the sum of its proper divisors (265469634).

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

216303966 is a wasteful number, since it uses less digits than its factorization.

216303966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9161 (or 9155 counting only the distinct ones).

The product of its (nonzero) digits is 34992, while the sum is 36.

The square root of 216303966 is about 14707.2759544383. The cubic root of 216303966 is about 600.2813180796.

The spelling of 216303966 in words is "two hundred sixteen million, three hundred three thousand, nine hundred sixty-six".