42530661317 has 2 divisors, whose sum is σ = 42530661318. Its totient is φ = 42530661316.

The previous prime is 42530661281. The next prime is 42530661331. The reversal of 42530661317 is 71316603524.

42530661317 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31440254596 + 11090406721 = 177314^2 + 105311^2 .

It is a cyclic number.

It is not a de Polignac number, because 42530661317 - 2²⁸ = 42262225861 is a prime.

It is a super-2 number, since 2×42530661317² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42530661367) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21265330658 + 21265330659.

It is an arithmetic number, because the mean of its divisors is an integer number (21265330659).

Almost surely, 2^42530661317 is an apocalyptic number.

It is an amenable number.

42530661317 is a deficient number, since it is larger than the sum of its proper divisors (1).

42530661317 is an equidigital number, since it uses as much as digits as its factorization.

42530661317 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 90720, while the sum is 38.

The spelling of 42530661317 in words is "forty-two billion, five hundred thirty million, six hundred sixty-one thousand, three hundred seventeen".