217555732401383 has 2 divisors, whose sum is σ = 217555732401384. Its totient is φ = 217555732401382.

The previous prime is 217555732401379. The next prime is 217555732401419. The reversal of 217555732401383 is 383104237555712.

217555732401383 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 217555732401383 - 2² = 217555732401379 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (217555732401883) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108777866200691 + 108777866200692.

It is an arithmetic number, because the mean of its divisors is an integer number (108777866200692).

Almost surely, 2^{217555732401383} is an apocalyptic number.

217555732401383 is a deficient number, since it is larger than the sum of its proper divisors (1).

217555732401383 is an equidigital number, since it uses as much as digits as its factorization.

217555732401383 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21168000, while the sum is 56.

The spelling of 217555732401383 in words is "two hundred seventeen trillion, five hundred fifty-five billion, seven hundred thirty-two million, four hundred one thousand, three hundred eighty-three".