217136602211257 has 8 divisors (see below), whose sum is σ = 219395349444096. Its totient is φ = 214878267745152.

The previous prime is 217136602211237. The next prime is 217136602211297. The reversal of 217136602211257 is 752112206631712.

217136602211257 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 217136602211257 - 2³⁵ = 217102242472889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (217136602211237) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 102134053 + ... + 104238370.

It is an arithmetic number, because the mean of its divisors is an integer number (27424418680512).

Almost surely, 2^{217136602211257} is an apocalyptic number.

It is an amenable number.

217136602211257 is a deficient number, since it is larger than the sum of its proper divisors (2258747232839).

217136602211257 is a wasteful number, since it uses less digits than its factorization.

217136602211257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206383367.

The product of its (nonzero) digits is 423360, while the sum is 46.

Adding to 217136602211257 its reverse (752112206631712), we get a palindrome (969248808842969).

The spelling of 217136602211257 in words is "two hundred seventeen trillion, one hundred thirty-six billion, six hundred two million, two hundred eleven thousand, two hundred fifty-seven".