216247303 has 6 divisors (see below), whose sum is σ = 228228144. Its totient is φ = 204865524.

The previous prime is 216247271. The next prime is 216247307. The reversal of 216247303 is 303742612.

216247303 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 216247303 - 2⁵ = 216247271 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 (216247307) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 299151 + ... + 299872.

It is an arithmetic number, because the mean of its divisors is an integer number (38038024).

Almost surely, 2^216247303 is an apocalyptic number.

216247303 is a deficient number, since it is larger than the sum of its proper divisors (11980841).

216247303 is an equidigital number, since it uses as much as digits as its factorization.

216247303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 599061 (or 599042 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 28.

The square root of 216247303 is about 14705.3494688158. The cubic root of 216247303 is about 600.2288969252.

Adding to 216247303 its reverse (303742612), we get a palindrome (519989915).

The spelling of 216247303 in words is "two hundred sixteen million, two hundred forty-seven thousand, three hundred three".