216366650 has 48 divisors (see below), whose sum is σ = 427814136. Its totient is φ = 81131520.

The previous prime is 216366649. The next prime is 216366673. The reversal of 216366650 is 56663612.

It can be written as a sum of positive squares in 12 ways, for example, as 26946481 + 189420169 = 5191^2 + 13763^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 216366650.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 388172 + ... + 388728.

Almost surely, 2^216366650 is an apocalyptic number.

216366650 is a deficient number, since it is larger than the sum of its proper divisors (211447486).

216366650 is a wasteful number, since it uses less digits than its factorization.

216366650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1043 (or 1038 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 35.

The square root of 216366650 is about 14709.4068541189. The cubic root of 216366650 is about 600.3392988317.

The spelling of 216366650 in words is "two hundred sixteen million, three hundred sixty-six thousand, six hundred fifty".