42171935231 has 2 divisors, whose sum is σ = 42171935232. Its totient is φ = 42171935230.

The previous prime is 42171935219. The next prime is 42171935233. The reversal of 42171935231 is 13253917124.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42171935231 is a prime.

It is a super-3 number, since 3×42171935231³ (a number of 33 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

Together with 42171935233, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42171935233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21085967615 + 21085967616.

It is an arithmetic number, because the mean of its divisors is an integer number (21085967616).

Almost surely, 2^42171935231 is an apocalyptic number.

42171935231 is a deficient number, since it is larger than the sum of its proper divisors (1).

42171935231 is an equidigital number, since it uses as much as digits as its factorization.

42171935231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 45360, while the sum is 38.

The spelling of 42171935231 in words is "forty-two billion, one hundred seventy-one million, nine hundred thirty-five thousand, two hundred thirty-one".