211433216065 has 8 divisors (see below), whose sum is σ = 260577153000. Its totient is φ = 164575043712.

The previous prime is 211433216053. The next prime is 211433216083. The reversal of 211433216065 is 560612334112.

It can be written as a sum of positive squares in 4 ways, for example, as 113115850929 + 98317365136 = 336327^2 + 313556^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-211433216065 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 211433216065.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 571440940 + ... + 571441309.

It is an arithmetic number, because the mean of its divisors is an integer number (32572144125).

Almost surely, 2^211433216065 is an apocalyptic number.

It is an amenable number.

211433216065 is a deficient number, since it is larger than the sum of its proper divisors (49143936935).

211433216065 is a wasteful number, since it uses less digits than its factorization.

211433216065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1142882291.

The product of its (nonzero) digits is 25920, while the sum is 34.

The spelling of 211433216065 in words is "two hundred eleven billion, four hundred thirty-three million, two hundred sixteen thousand, sixty-five".