42000324209 has 2 divisors, whose sum is σ = 42000324210. Its totient is φ = 42000324208.

The previous prime is 42000324199. The next prime is 42000324217. The reversal of 42000324209 is 90242300024.

42000324209 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., 23983168225 + 18017155984 = 154865^2 + 134228^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42000324209 is a prime.

It is a super-2 number, since 2×42000324209² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (42000324409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21000162104 + 21000162105.

It is an arithmetic number, because the mean of its divisors is an integer number (21000162105).

Almost surely, 2^42000324209 is an apocalyptic number.

It is an amenable number.

42000324209 is a deficient number, since it is larger than the sum of its proper divisors (1).

42000324209 is an equidigital number, since it uses as much as digits as its factorization.

42000324209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 26.

The spelling of 42000324209 in words is "forty-two billion, three hundred twenty-four thousand, two hundred nine".