422443181 has 2 divisors, whose sum is σ = 422443182. Its totient is φ = 422443180.

The previous prime is 422443157. The next prime is 422443247. The reversal of 422443181 is 181344224.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 317196100 + 105247081 = 17810^2 + 10259^2 .

It is a cyclic number.

It is not a de Polignac number, because 422443181 - 2¹⁸ = 422181037 is a prime.

It is a super-2 number, since 2×422443181² = 356916482346797522, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (422443121) 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, 211221590 + 211221591.

It is an arithmetic number, because the mean of its divisors is an integer number (211221591).

Almost surely, 2^422443181 is an apocalyptic number.

It is an amenable number.

422443181 is a deficient number, since it is larger than the sum of its proper divisors (1).

422443181 is an equidigital number, since it uses as much as digits as its factorization.

422443181 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6144, while the sum is 29.

The square root of 422443181 is about 20553.4226103586. The cubic root of 422443181 is about 750.3365488091.

The spelling of 422443181 in words is "four hundred twenty-two million, four hundred forty-three thousand, one hundred eighty-one".