42242951717 has 2 divisors, whose sum is σ = 42242951718. Its totient is φ = 42242951716.

The previous prime is 42242951627. The next prime is 42242951749. The reversal of 42242951717 is 71715924224.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 35783775556 + 6459176161 = 189166^2 + 80369^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42242951717 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42242953717) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21121475858 + 21121475859.

It is an arithmetic number, because the mean of its divisors is an integer number (21121475859).

Almost surely, 2^42242951717 is an apocalyptic number.

It is an amenable number.

42242951717 is a deficient number, since it is larger than the sum of its proper divisors (1).

42242951717 is an equidigital number, since it uses as much as digits as its factorization.

42242951717 is an evil number, because the sum of its binary digits is even.

The product of its digits is 282240, while the sum is 44.

The spelling of 42242951717 in words is "forty-two billion, two hundred forty-two million, nine hundred fifty-one thousand, seven hundred seventeen".