216637116 has 24 divisors (see below), whose sum is σ = 505916544. Its totient is φ = 72150960.

The previous prime is 216637087. The next prime is 216637121. The reversal of 216637116 is 611736612.

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 7 ways as a sum of consecutive naturals, for example, 8361 + ... + 22431.

It is an arithmetic number, because the mean of its divisors is an integer number (21079856).

Almost surely, 2^216637116 is an apocalyptic number.

It is an amenable number.

216637116 is an abundant number, since it is smaller than the sum of its proper divisors (289279428).

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

216637116 is a wasteful number, since it uses less digits than its factorization.

216637116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15361 (or 15359 counting only the distinct ones).

The product of its digits is 9072, while the sum is 33.

The square root of 216637116 is about 14718.5976234151. The cubic root of 216637116 is about 600.5893431571.

The spelling of 216637116 in words is "two hundred sixteen million, six hundred thirty-seven thousand, one hundred sixteen".