216831116 has 24 divisors (see below), whose sum is σ = 407930880. Its totient is φ = 100522512.

The previous prime is 216831103. The next prime is 216831127. The reversal of 216831116 is 611138612.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 26780 + ... + 33923.

It is an arithmetic number, because the mean of its divisors is an integer number (16997120).

Almost surely, 2^216831116 is an apocalyptic number.

It is an amenable number.

216831116 is a deficient number, since it is larger than the sum of its proper divisors (191099764).

216831116 is a wasteful number, since it uses less digits than its factorization.

216831116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60773 (or 60771 counting only the distinct ones).

The product of its digits is 1728, while the sum is 29.

The square root of 216831116 is about 14725.1864504325. The cubic root of 216831116 is about 600.7685669396.

Adding to 216831116 its reverse (611138612), we get a palindrome (827969728).

The spelling of 216831116 in words is "two hundred sixteen million, eight hundred thirty-one thousand, one hundred sixteen".