216528256013 has 2 divisors, whose sum is σ = 216528256014. Its totient is φ = 216528256012.

The previous prime is 216528255997. The next prime is 216528256033. The reversal of 216528256013 is 310652825612.

216528256013 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 167573153449 + 48955102564 = 409357^2 + 221258^2 .

It is a cyclic number.

It is not a de Polignac number, because 216528256013 - 2⁴ = 216528255997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (216528256033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108264128006 + 108264128007.

It is an arithmetic number, because the mean of its divisors is an integer number (108264128007).

Almost surely, 2^216528256013 is an apocalyptic number.

It is an amenable number.

216528256013 is a deficient number, since it is larger than the sum of its proper divisors (1).

216528256013 is an equidigital number, since it uses as much as digits as its factorization.

216528256013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 172800, while the sum is 41.

The spelling of 216528256013 in words is "two hundred sixteen billion, five hundred twenty-eight million, two hundred fifty-six thousand, thirteen".