216366732 has 36 divisors (see below), whose sum is σ = 564572736. Its totient is φ = 69795360.

The previous prime is 216366721. The next prime is 216366739. The reversal of 216366732 is 237663612.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (216366739) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 95823 + ... + 98054.

It is an arithmetic number, because the mean of its divisors is an integer number (15682576).

Almost surely, 2^216366732 is an apocalyptic number.

It is an amenable number.

216366732 is an abundant number, since it is smaller than the sum of its proper divisors (348206004).

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

216366732 is a wasteful number, since it uses less digits than its factorization.

216366732 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193918 (or 193913 counting only the distinct ones).

The product of its digits is 54432, while the sum is 36.

The square root of 216366732 is about 14709.4096414506. The cubic root of 216366732 is about 600.3393746719.

The spelling of 216366732 in words is "two hundred sixteen million, three hundred sixty-six thousand, seven hundred thirty-two".