216080811 has 16 divisors (see below), whose sum is σ = 320350720. Its totient is φ = 143949960.

The previous prime is 216080797. The next prime is 216080857. The reversal of 216080811 is 118080612.

It is not a de Polignac number, because 216080811 - 2⁵ = 216080779 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (216080411) 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 15 ways as a sum of consecutive naturals, for example, 60666 + ... + 64128.

It is an arithmetic number, because the mean of its divisors is an integer number (20021920).

Almost surely, 2^216080811 is an apocalyptic number.

216080811 is a deficient number, since it is larger than the sum of its proper divisors (104269909).

216080811 is a wasteful number, since it uses less digits than its factorization.

216080811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5783 (or 5777 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 27.

The square root of 216080811 is about 14699.6874456568. The cubic root of 216080811 is about 600.0748156706.

The spelling of 216080811 in words is "two hundred sixteen million, eighty thousand, eight hundred eleven".