216616303 has 2 divisors, whose sum is σ = 216616304. Its totient is φ = 216616302.

The previous prime is 216616297. The next prime is 216616333. The reversal of 216616303 is 303616612.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-216616303 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (216616333) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108308151 + 108308152.

It is an arithmetic number, because the mean of its divisors is an integer number (108308152).

Almost surely, 2^216616303 is an apocalyptic number.

216616303 is a deficient number, since it is larger than the sum of its proper divisors (1).

216616303 is an equidigital number, since it uses as much as digits as its factorization.

216616303 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 28.

The square root of 216616303 is about 14717.8905757585. The cubic root of 216616303 is about 600.5701090471.

The spelling of 216616303 in words is "two hundred sixteen million, six hundred sixteen thousand, three hundred three".