216188732 has 12 divisors (see below), whose sum is σ = 379286040. Its totient is φ = 107821296.

The previous prime is 216188729. The next prime is 216188737. The reversal of 216188732 is 237881612.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216188737) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66482 + ... + 69657.

It is an arithmetic number, because the mean of its divisors is an integer number (31607170).

Almost surely, 2^216188732 is an apocalyptic number.

It is an amenable number.

216188732 is a deficient number, since it is larger than the sum of its proper divisors (163097308).

216188732 is a wasteful number, since it uses less digits than its factorization.

216188732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136540 (or 136538 counting only the distinct ones).

The product of its digits is 32256, while the sum is 38.

The square root of 216188732 is about 14703.3578477843. The cubic root of 216188732 is about 600.1747009795.

The spelling of 216188732 in words is "two hundred sixteen million, one hundred eighty-eight thousand, seven hundred thirty-two".