216516603303 has 192 divisors, whose sum is σ = 439026352128. Its totient is φ = 99115695360.

The previous prime is 216516603271. The next prime is 216516603313. The reversal of 216516603303 is 303306615612.

216516603303 is a `hidden beast` number, since 2 + 1 + 6 + 5 + 16 + 603 + 30 + 3 = 666.

It is not a de Polignac number, because 216516603303 - 2⁵ = 216516603271 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216516603313) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 203683950 + ... + 203685012.

It is an arithmetic number, because the mean of its divisors is an integer number (2286595584).

Almost surely, 2^216516603303 is an apocalyptic number.

216516603303 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

216516603303 is an abundant number, since it is smaller than the sum of its proper divisors (222509748825).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

216516603303 is a wasteful number, since it uses less digits than its factorization.

216516603303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2106 (or 2103 counting only the distinct ones).

The product of its (nonzero) digits is 58320, while the sum is 36.

The spelling of 216516603303 in words is "two hundred sixteen billion, five hundred sixteen million, six hundred three thousand, three hundred three".