216538892 has 12 divisors (see below), whose sum is σ = 379065456. Its totient is φ = 108234480.

The previous prime is 216538891. The next prime is 216538901. The reversal of 216538892 is 298835612.

It is not an unprimeable number, because it can be changed into a prime (216538891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9353 + ... + 22815.

It is an arithmetic number, because the mean of its divisors is an integer number (31588788).

Almost surely, 2^216538892 is an apocalyptic number.

It is an amenable number.

216538892 is a deficient number, since it is larger than the sum of its proper divisors (162526564).

216538892 is a wasteful number, since it uses less digits than its factorization.

216538892 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17488 (or 17486 counting only the distinct ones).

The product of its digits is 207360, while the sum is 44.

The square root of 216538892 is about 14715.2605141737. The cubic root of 216538892 is about 600.4985596897.

The spelling of 216538892 in words is "two hundred sixteen million, five hundred thirty-eight thousand, eight hundred ninety-two".