216552416602321 has 8 divisors (see below), whose sum is σ = 216675385886024. Its totient is φ = 216429480161280.

The previous prime is 216552416602289. The next prime is 216552416602337. The reversal of 216552416602321 is 123206614255612.

216552416602321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 13882599076096 + 202669817526225 = 3725936^2 + 14236215^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 216552416602321 - 2⁵ = 216552416602289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (216552416600321) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4986361 + ... + 21400201.

It is an arithmetic number, because the mean of its divisors is an integer number (27084423235753).

Almost surely, 2^{216552416602321} is an apocalyptic number.

It is an amenable number.

216552416602321 is a deficient number, since it is larger than the sum of its proper divisors (122969283703).

216552416602321 is a wasteful number, since it uses less digits than its factorization.

216552416602321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16421331.

The product of its (nonzero) digits is 1036800, while the sum is 46.

The spelling of 216552416602321 in words is "two hundred sixteen trillion, five hundred fifty-two billion, four hundred sixteen million, six hundred two thousand, three hundred twenty-one".