217281517259 has 2 divisors, whose sum is σ = 217281517260. Its totient is φ = 217281517258.

The previous prime is 217281517157. The next prime is 217281517261. The reversal of 217281517259 is 952715182712.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-217281517259 is a prime.

It is a super-2 number, since 2×217281517259² (a number of 23 digits) contains 22 as substring.

Together with 217281517261, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (217281517459) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108640758629 + 108640758630.

It is an arithmetic number, because the mean of its divisors is an integer number (108640758630).

Almost surely, 2^217281517259 is an apocalyptic number.

217281517259 is a deficient number, since it is larger than the sum of its proper divisors (1).

217281517259 is an equidigital number, since it uses as much as digits as its factorization.

217281517259 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 705600, while the sum is 50.

The spelling of 217281517259 in words is "two hundred seventeen billion, two hundred eighty-one million, five hundred seventeen thousand, two hundred fifty-nine".