210243404342017 has 2 divisors, whose sum is σ = 210243404342018. Its totient is φ = 210243404342016.

The previous prime is 210243404342011. The next prime is 210243404342033. The reversal of 210243404342017 is 710243404342012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 155159932855041 + 55083471486976 = 12456321^2 + 7421824^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-210243404342017 is a prime.

It is not a weakly prime, because it can be changed into another prime (210243404342011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105121702171008 + 105121702171009.

It is an arithmetic number, because the mean of its divisors is an integer number (105121702171009).

Almost surely, 2^{210243404342017} is an apocalyptic number.

It is an amenable number.

210243404342017 is a deficient number, since it is larger than the sum of its proper divisors (1).

210243404342017 is an equidigital number, since it uses as much as digits as its factorization.

210243404342017 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 129024, while the sum is 37.

Adding to 210243404342017 its reverse (710243404342012), we get a palindrome (920486808684029).

The spelling of 210243404342017 in words is "two hundred ten trillion, two hundred forty-three billion, four hundred four million, three hundred forty-two thousand, seventeen".