216206885171413 has 4 divisors (see below), whose sum is σ = 223662295004940. Its totient is φ = 208751475337888.

The previous prime is 216206885171401. The next prime is 216206885171531. The reversal of 216206885171413 is 314171588602612.

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

It can be written as a sum of positive squares in 2 ways, for example, as 94932323595684 + 121274561575729 = 9743322^2 + 11012473^2 .

It is a cyclic number.

It is not a de Polignac number, because 216206885171413 - 2³⁷ = 216069446217941 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 (216206885171213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3727704916720 + ... + 3727704916777.

It is an arithmetic number, because the mean of its divisors is an integer number (55915573751235).

Almost surely, 2^{216206885171413} is an apocalyptic number.

It is an amenable number.

216206885171413 is a deficient number, since it is larger than the sum of its proper divisors (7455409833527).

216206885171413 is an equidigital number, since it uses as much as digits as its factorization.

216206885171413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7455409833526.

The product of its (nonzero) digits is 3870720, while the sum is 55.

The spelling of 216206885171413 in words is "two hundred sixteen trillion, two hundred six billion, eight hundred eighty-five million, one hundred seventy-one thousand, four hundred thirteen".