216610116 has 12 divisors (see below), whose sum is σ = 505423632. Its totient is φ = 72203368.

The previous prime is 216610111. The next prime is 216610123. The reversal of 216610116 is 611016612.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (216610111) 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, 9025410 + ... + 9025433.

It is an arithmetic number, because the mean of its divisors is an integer number (42118636).

Almost surely, 2^216610116 is an apocalyptic number.

It is an amenable number.

216610116 is an abundant number, since it is smaller than the sum of its proper divisors (288813516).

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

216610116 is a wasteful number, since it uses less digits than its factorization.

216610116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18050850 (or 18050848 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 24.

The square root of 216610116 is about 14717.6803878872. The cubic root of 216610116 is about 600.5643911601.

Adding to 216610116 its reverse (611016612), we get a palindrome (827626728).

The spelling of 216610116 in words is "two hundred sixteen million, six hundred ten thousand, one hundred sixteen".