217202066005 has 8 divisors (see below), whose sum is σ = 263223098424. Its totient is φ = 172041240000.

The previous prime is 217202065943. The next prime is 217202066021. The reversal of 217202066005 is 500660202712.

It can be written as a sum of positive squares in 4 ways, for example, as 100703406244 + 116498659761 = 317338^2 + 341319^2 .

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

It is not a de Polignac number, because 217202066005 - 2⁷ = 217202065877 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 215051046 + ... + 215052055.

It is an arithmetic number, because the mean of its divisors is an integer number (32902887303).

Almost surely, 2^217202066005 is an apocalyptic number.

It is an amenable number.

217202066005 is a deficient number, since it is larger than the sum of its proper divisors (46021032419).

217202066005 is a wasteful number, since it uses less digits than its factorization.

217202066005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 430103207.

The product of its (nonzero) digits is 10080, while the sum is 31.

Adding to 217202066005 its reverse (500660202712), we get a palindrome (717862268717).

The spelling of 217202066005 in words is "two hundred seventeen billion, two hundred two million, sixty-six thousand, five".