217080594851 has 4 divisors (see below), whose sum is σ = 217087937832. Its totient is φ = 217073251872.

The previous prime is 217080594827. The next prime is 217080594889. The reversal of 217080594851 is 158495080712.

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

It is a cyclic number.

It is not a de Polignac number, because 217080594851 - 2¹⁴ = 217080578467 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 217080594851.

It is not an unprimeable number, because it can be changed into a prime (217080594551) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3626966 + ... + 3686331.

It is an arithmetic number, because the mean of its divisors is an integer number (54271984458).

Almost surely, 2^217080594851 is an apocalyptic number.

217080594851 is a deficient number, since it is larger than the sum of its proper divisors (7342981).

217080594851 is an equidigital number, since it uses as much as digits as its factorization.

217080594851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7342980.

The product of its (nonzero) digits is 806400, while the sum is 50.

The spelling of 217080594851 in words is "two hundred seventeen billion, eighty million, five hundred ninety-four thousand, eight hundred fifty-one".