422287321 has 2 divisors, whose sum is σ = 422287322. Its totient is φ = 422287320.

The previous prime is 422287309. The next prime is 422287343. The reversal of 422287321 is 123782224.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 392475721 + 29811600 = 19811^2 + 5460^2 .

It is a cyclic number.

It is not a de Polignac number, because 422287321 - 2¹¹ = 422285273 is a prime.

It is not a weakly prime, because it can be changed into another prime (422287351) 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, 211143660 + 211143661.

It is an arithmetic number, because the mean of its divisors is an integer number (211143661).

Almost surely, 2^422287321 is an apocalyptic number.

It is an amenable number.

422287321 is a deficient number, since it is larger than the sum of its proper divisors (1).

422287321 is an equidigital number, since it uses as much as digits as its factorization.

422287321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10752, while the sum is 31.

The square root of 422287321 is about 20549.6306779465. The cubic root of 422287321 is about 750.2442588119.

The spelling of 422287321 in words is "four hundred twenty-two million, two hundred eighty-seven thousand, three hundred twenty-one".