216301663 has 4 divisors (see below), whose sum is σ = 223279168. Its totient is φ = 209324160.

The previous prime is 216301651. The next prime is 216301733. The reversal of 216301663 is 366103612.

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

It is a cyclic number.

It is not a de Polignac number, because 216301663 - 2²⁵ = 182747231 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216311663) 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, 3488706 + ... + 3488767.

It is an arithmetic number, because the mean of its divisors is an integer number (55819792).

Almost surely, 2^216301663 is an apocalyptic number.

216301663 is a deficient number, since it is larger than the sum of its proper divisors (6977505).

216301663 is an equidigital number, since it uses as much as digits as its factorization.

216301663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6977504.

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

The square root of 216301663 is about 14707.1976596495. The cubic root of 216301663 is about 600.2791876629.

The spelling of 216301663 in words is "two hundred sixteen million, three hundred one thousand, six hundred sixty-three".