217798383307 has 2 divisors, whose sum is σ = 217798383308. Its totient is φ = 217798383306.

The previous prime is 217798383259. The next prime is 217798383347. The reversal of 217798383307 is 703383897712.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 217798383307 - 2¹¹ = 217798381259 is a prime.

It is a super-2 number, since 2×217798383307² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (217798383347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108899191653 + 108899191654.

It is an arithmetic number, because the mean of its divisors is an integer number (108899191654).

Almost surely, 2^217798383307 is an apocalyptic number.

217798383307 is a deficient number, since it is larger than the sum of its proper divisors (1).

217798383307 is an equidigital number, since it uses as much as digits as its factorization.

217798383307 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10668672, while the sum is 58.

The spelling of 217798383307 in words is "two hundred seventeen billion, seven hundred ninety-eight million, three hundred eighty-three thousand, three hundred seven".