42455440171 has 2 divisors, whose sum is σ = 42455440172. Its totient is φ = 42455440170.

The previous prime is 42455440151. The next prime is 42455440177. The reversal of 42455440171 is 17104455424.

42455440171 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 is a cyclic number.

It is not a de Polignac number, because 42455440171 - 2⁷ = 42455440043 is a prime.

It is a super-2 number, since 2×42455440171² (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 42455440171.

It is not a weakly prime, because it can be changed into another prime (42455440177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21227720085 + 21227720086.

It is an arithmetic number, because the mean of its divisors is an integer number (21227720086).

Almost surely, 2^42455440171 is an apocalyptic number.

42455440171 is a deficient number, since it is larger than the sum of its proper divisors (1).

42455440171 is an equidigital number, since it uses as much as digits as its factorization.

42455440171 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 89600, while the sum is 37.

Adding to 42455440171 its reverse (17104455424), we get a palindrome (59559895595).

The spelling of 42455440171 in words is "forty-two billion, four hundred fifty-five million, four hundred forty thousand, one hundred seventy-one".