216533650 has 12 divisors (see below), whose sum is σ = 402752682. Its totient is φ = 86613440.

The previous prime is 216533617. The next prime is 216533659. The reversal of 216533650 is 56335612.

It can be written as a sum of positive squares in 3 ways, for example, as 186950929 + 29582721 = 13673^2 + 5439^2 .

It is not an unprimeable number, because it can be changed into a prime (216533659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2165287 + ... + 2165386.

Almost surely, 2^216533650 is an apocalyptic number.

216533650 is a deficient number, since it is larger than the sum of its proper divisors (186219032).

216533650 is a wasteful number, since it uses less digits than its factorization.

216533650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4330685 (or 4330680 counting only the distinct ones).

The product of its (nonzero) digits is 16200, while the sum is 31.

The square root of 216533650 is about 14715.0823986820. The cubic root of 216533650 is about 600.4937140031.

The spelling of 216533650 in words is "two hundred sixteen million, five hundred thirty-three thousand, six hundred fifty".