42343344181 has 2 divisors, whose sum is σ = 42343344182. Its totient is φ = 42343344180.

The previous prime is 42343344107. The next prime is 42343344209. The reversal of 42343344181 is 18144334324.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 37925615025 + 4417729156 = 194745^2 + 66466^2 .

It is a cyclic number.

It is not a de Polignac number, because 42343344181 - 2³³ = 33753409589 is a prime.

It is a super-2 number, since 2×42343344181² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 42343344181.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42343341181) 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, 21171672090 + 21171672091.

It is an arithmetic number, because the mean of its divisors is an integer number (21171672091).

Almost surely, 2^42343344181 is an apocalyptic number.

It is an amenable number.

42343344181 is a deficient number, since it is larger than the sum of its proper divisors (1).

42343344181 is an equidigital number, since it uses as much as digits as its factorization.

42343344181 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 110592, while the sum is 37.

The spelling of 42343344181 in words is "forty-two billion, three hundred forty-three million, three hundred forty-four thousand, one hundred eighty-one".