422213509 has 2 divisors, whose sum is σ = 422213510. Its totient is φ = 422213508.

The previous prime is 422213471. The next prime is 422213543. The reversal of 422213509 is 905312224.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 272151009 + 150062500 = 16497^2 + 12250^2 .

It is a cyclic number.

It is not a de Polignac number, because 422213509 - 2⁹ = 422212997 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (422213579) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211106754 + 211106755.

It is an arithmetic number, because the mean of its divisors is an integer number (211106755).

Almost surely, 2^422213509 is an apocalyptic number.

It is an amenable number.

422213509 is a deficient number, since it is larger than the sum of its proper divisors (1).

422213509 is an equidigital number, since it uses as much as digits as its factorization.

422213509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 422213509 is about 20547.8346547757. The cubic root of 422213509 is about 750.2005442971.

The spelling of 422213509 in words is "four hundred twenty-two million, two hundred thirteen thousand, five hundred nine".