422320686521 has 2 divisors, whose sum is σ = 422320686522. Its totient is φ = 422320686520.

The previous prime is 422320686449. The next prime is 422320686539. The reversal of 422320686521 is 125686023224.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 404764436521 + 17556250000 = 636211^2 + 132500^2 .

It is a cyclic number.

It is not a de Polignac number, because 422320686521 - 2¹⁸ = 422320424377 is a prime.

It is not a weakly prime, because it can be changed into another prime (422320686551) 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, 211160343260 + 211160343261.

It is an arithmetic number, because the mean of its divisors is an integer number (211160343261).

Almost surely, 2^422320686521 is an apocalyptic number.

It is an amenable number.

422320686521 is a deficient number, since it is larger than the sum of its proper divisors (1).

422320686521 is an equidigital number, since it uses as much as digits as its factorization.

422320686521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 276480, while the sum is 41.

The spelling of 422320686521 in words is "four hundred twenty-two billion, three hundred twenty million, six hundred eighty-six thousand, five hundred twenty-one".