42516404171 has 2 divisors, whose sum is σ = 42516404172. Its totient is φ = 42516404170.

The previous prime is 42516404131. The next prime is 42516404173. The reversal of 42516404171 is 17140461524.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42516404171 - 2²² = 42512209867 is a prime.

Together with 42516404173, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (42516404173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21258202085 + 21258202086.

It is an arithmetic number, because the mean of its divisors is an integer number (21258202086).

Almost surely, 2^42516404171 is an apocalyptic number.

42516404171 is a deficient number, since it is larger than the sum of its proper divisors (1).

42516404171 is an equidigital number, since it uses as much as digits as its factorization.

42516404171 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 26880, while the sum is 35.

Adding to 42516404171 its reverse (17140461524), we get a palindrome (59656865695).

The spelling of 42516404171 in words is "forty-two billion, five hundred sixteen million, four hundred four thousand, one hundred seventy-one".