42171250505 has 8 divisors (see below), whose sum is σ = 50617141512. Its totient is φ = 33729239808.

The previous prime is 42171250469. The next prime is 42171250507. The reversal of 42171250505 is 50505217124.

42171250505 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 29185280569 + 12985969936 = 170837^2 + 113956^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 42171250505 - 2⁶ = 42171250441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42171250507) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 946112 + ... + 989681.

It is an arithmetic number, because the mean of its divisors is an integer number (6327142689).

Almost surely, 2^42171250505 is an apocalyptic number.

It is an amenable number.

42171250505 is a deficient number, since it is larger than the sum of its proper divisors (8445891007).

42171250505 is a wasteful number, since it uses less digits than its factorization.

42171250505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1940155.

The product of its (nonzero) digits is 14000, while the sum is 32.

Adding to 42171250505 its reverse (50505217124), we get a palindrome (92676467629).

The spelling of 42171250505 in words is "forty-two billion, one hundred seventy-one million, two hundred fifty thousand, five hundred five".