216466073 has 4 divisors (see below), whose sum is σ = 218697780. Its totient is φ = 214234368.

The previous prime is 216466057. The next prime is 216466099. The reversal of 216466073 is 370664612.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 156450064 + 60016009 = 12508^2 + 7747^2 .

It is a cyclic number.

It is not a de Polignac number, because 216466073 - 2⁴ = 216466057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (216466013) 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, 1115708 + ... + 1115901.

It is an arithmetic number, because the mean of its divisors is an integer number (54674445).

Almost surely, 2^216466073 is an apocalyptic number.

It is an amenable number.

216466073 is a deficient number, since it is larger than the sum of its proper divisors (2231707).

216466073 is an equidigital number, since it uses as much as digits as its factorization.

216466073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2231706.

The product of its (nonzero) digits is 36288, while the sum is 35.

The square root of 216466073 is about 14712.7860380011. The cubic root of 216466073 is about 600.4312390546.

The spelling of 216466073 in words is "two hundred sixteen million, four hundred sixty-six thousand, seventy-three".