42004323217 has 2 divisors, whose sum is σ = 42004323218. Its totient is φ = 42004323216.

The previous prime is 42004323191. The next prime is 42004323241. The reversal of 42004323217 is 71232340024.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25241583376 + 16762739841 = 158876^2 + 129471^2 .

It is a cyclic number.

It is not a de Polignac number, because 42004323217 - 2¹⁹ = 42003798929 is a prime.

It is not a weakly prime, because it can be changed into another prime (42004323617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21002161608 + 21002161609.

It is an arithmetic number, because the mean of its divisors is an integer number (21002161609).

Almost surely, 2^42004323217 is an apocalyptic number.

It is an amenable number.

42004323217 is a deficient number, since it is larger than the sum of its proper divisors (1).

42004323217 is an equidigital number, since it uses as much as digits as its factorization.

42004323217 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8064, while the sum is 28.

The spelling of 42004323217 in words is "forty-two billion, four million, three hundred twenty-three thousand, two hundred seventeen".