42530849321 has 2 divisors, whose sum is σ = 42530849322. Its totient is φ = 42530849320.

The previous prime is 42530849297. The next prime is 42530849341. The reversal of 42530849321 is 12394803524.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28879263721 + 13651585600 = 169939^2 + 116840^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42530849321 is a prime.

It is a super-3 number, since 3×42530849321³ (a number of 33 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (42530849341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21265424660 + 21265424661.

It is an arithmetic number, because the mean of its divisors is an integer number (21265424661).

Almost surely, 2^42530849321 is an apocalyptic number.

It is an amenable number.

42530849321 is a deficient number, since it is larger than the sum of its proper divisors (1).

42530849321 is an equidigital number, since it uses as much as digits as its factorization.

42530849321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 207360, while the sum is 41.

The spelling of 42530849321 in words is "forty-two billion, five hundred thirty million, eight hundred forty-nine thousand, three hundred twenty-one".