42170237771 has 2 divisors, whose sum is σ = 42170237772. Its totient is φ = 42170237770.

The previous prime is 42170237717. The next prime is 42170237773. The reversal of 42170237771 is 17773207124.

Together with previous prime (42170237717) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42170237771 is a prime.

Together with 42170237773, 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 (42170237773) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21085118885 + 21085118886.

It is an arithmetic number, because the mean of its divisors is an integer number (21085118886).

Almost surely, 2^42170237771 is an apocalyptic number.

42170237771 is a deficient number, since it is larger than the sum of its proper divisors (1).

42170237771 is an equidigital number, since it uses as much as digits as its factorization.

42170237771 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 115248, while the sum is 41.

The spelling of 42170237771 in words is "forty-two billion, one hundred seventy million, two hundred thirty-seven thousand, seven hundred seventy-one".