217798383359 has 2 divisors, whose sum is σ = 217798383360. Its totient is φ = 217798383358.

The previous prime is 217798383347. The next prime is 217798383391. The reversal of 217798383359 is 953383897712.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 217798383359 - 2¹² = 217798379263 is a prime.

It is a super-2 number, since 2×217798383359² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 217798383295 and 217798383304.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (217798383259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108899191679 + 108899191680.

It is an arithmetic number, because the mean of its divisors is an integer number (108899191680).

Almost surely, 2^217798383359 is an apocalyptic number.

217798383359 is a deficient number, since it is larger than the sum of its proper divisors (1).

217798383359 is an equidigital number, since it uses as much as digits as its factorization.

217798383359 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 68584320, while the sum is 65.

The spelling of 217798383359 in words is "two hundred seventeen billion, seven hundred ninety-eight million, three hundred eighty-three thousand, three hundred fifty-nine".