216080873 has 2 divisors, whose sum is σ = 216080874. Its totient is φ = 216080872.

The previous prime is 216080869. The next prime is 216080923. The reversal of 216080873 is 378080612.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 199007449 + 17073424 = 14107^2 + 4132^2 .

It is a cyclic number.

It is not a de Polignac number, because 216080873 - 2² = 216080869 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is equal to p_11918618 and since 216080873 and 11918618 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (216080173) 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 as a sum of consecutive naturals, namely, 108040436 + 108040437.

It is an arithmetic number, because the mean of its divisors is an integer number (108040437).

Almost surely, 2^216080873 is an apocalyptic number.

It is an amenable number.

216080873 is a deficient number, since it is larger than the sum of its proper divisors (1).

216080873 is an equidigital number, since it uses as much as digits as its factorization.

216080873 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 216080873 is about 14699.6895545450. The cubic root of 216080873 is about 600.0748730637.

The spelling of 216080873 in words is "two hundred sixteen million, eighty thousand, eight hundred seventy-three".