42052345217 has 2 divisors, whose sum is σ = 42052345218. Its totient is φ = 42052345216.

The previous prime is 42052345199. The next prime is 42052345241. The reversal of 42052345217 is 71254325024.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28601912641 + 13450432576 = 169121^2 + 115976^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42052345217 is a prime.

It is not a weakly prime, because it can be changed into another prime (42052345417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21026172608 + 21026172609.

It is an arithmetic number, because the mean of its divisors is an integer number (21026172609).

Almost surely, 2^42052345217 is an apocalyptic number.

It is an amenable number.

42052345217 is a deficient number, since it is larger than the sum of its proper divisors (1).

42052345217 is an equidigital number, since it uses as much as digits as its factorization.

42052345217 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 67200, while the sum is 35.

The spelling of 42052345217 in words is "forty-two billion, fifty-two million, three hundred forty-five thousand, two hundred seventeen".