422350021 has 2 divisors, whose sum is σ = 422350022. Its totient is φ = 422350020.

The previous prime is 422350001. The next prime is 422350051. The reversal of 422350021 is 120053224.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 407030625 + 15319396 = 20175^2 + 3914^2 .

It is a cyclic number.

It is not a de Polignac number, because 422350021 - 2¹⁷ = 422218949 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (422350001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211175010 + 211175011.

It is an arithmetic number, because the mean of its divisors is an integer number (211175011).

Almost surely, 2^422350021 is an apocalyptic number.

It is an amenable number.

422350021 is a deficient number, since it is larger than the sum of its proper divisors (1).

422350021 is an equidigital number, since it uses as much as digits as its factorization.

422350021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 422350021 is about 20551.1561961852. The cubic root of 422350021 is about 750.2813883402.

The spelling of 422350021 in words is "four hundred twenty-two million, three hundred fifty thousand, twenty-one".