42224891 has 2 divisors, whose sum is σ = 42224892. Its totient is φ = 42224890.

The previous prime is 42224873. The next prime is 42224909. The reversal of 42224891 is 19842224.

It is a happy number.

42224891 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a balanced prime because it is at equal distance from previous prime (42224873) and next prime (42224909).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42224891 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (42224291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21112445 + 21112446.

It is an arithmetic number, because the mean of its divisors is an integer number (21112446).

Almost surely, 2^42224891 is an apocalyptic number.

42224891 is a deficient number, since it is larger than the sum of its proper divisors (1).

42224891 is an equidigital number, since it uses as much as digits as its factorization.

42224891 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9216, while the sum is 32.

The square root of 42224891 is about 6498.0682514113. The cubic root of 42224891 is about 348.2219787577.

The spelling of 42224891 in words is "forty-two million, two hundred twenty-four thousand, eight hundred ninety-one".