42331890191 has 2 divisors, whose sum is σ = 42331890192. Its totient is φ = 42331890190.

The previous prime is 42331890187. The next prime is 42331890221. The reversal of 42331890191 is 19109813324.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42331890191 - 2² = 42331890187 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42331890101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21165945095 + 21165945096.

It is an arithmetic number, because the mean of its divisors is an integer number (21165945096).

Almost surely, 2^42331890191 is an apocalyptic number.

42331890191 is a deficient number, since it is larger than the sum of its proper divisors (1).

42331890191 is an equidigital number, since it uses as much as digits as its factorization.

42331890191 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 46656, while the sum is 41.

The spelling of 42331890191 in words is "forty-two billion, three hundred thirty-one million, eight hundred ninety thousand, one hundred ninety-one".