422815213 has 2 divisors, whose sum is σ = 422815214. Its totient is φ = 422815212.

The previous prime is 422815201. The next prime is 422815219. The reversal of 422815213 is 312518224.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 282676969 + 140138244 = 16813^2 + 11838^2 .

It is a cyclic number.

It is not a de Polignac number, because 422815213 - 2²¹ = 420718061 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (422815219) 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, 211407606 + 211407607.

It is an arithmetic number, because the mean of its divisors is an integer number (211407607).

Almost surely, 2^422815213 is an apocalyptic number.

It is an amenable number.

422815213 is a deficient number, since it is larger than the sum of its proper divisors (1).

422815213 is an equidigital number, since it uses as much as digits as its factorization.

422815213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3840, while the sum is 28.

The square root of 422815213 is about 20562.4709847820. The cubic root of 422815213 is about 750.5567498631.

The spelling of 422815213 in words is "four hundred twenty-two million, eight hundred fifteen thousand, two hundred thirteen".