422021443 has 4 divisors (see below), whose sum is σ = 422091208. Its totient is φ = 421951680.

The previous prime is 422021429. The next prime is 422021459. The reversal of 422021443 is 344120224.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 422021443 - 2⁹ = 422020931 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (422021423) 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 in 3 ways as a sum of consecutive naturals, for example, 24846 + ... + 38227.

It is an arithmetic number, because the mean of its divisors is an integer number (105522802).

Almost surely, 2^422021443 is an apocalyptic number.

422021443 is a deficient number, since it is larger than the sum of its proper divisors (69765).

422021443 is an equidigital number, since it uses as much as digits as its factorization.

422021443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69764.

The product of its (nonzero) digits is 1536, while the sum is 22.

The square root of 422021443 is about 20543.1604919983. The cubic root of 422021443 is about 750.0867709977.

Adding to 422021443 its reverse (344120224), we get a palindrome (766141667).

The spelling of 422021443 in words is "four hundred twenty-two million, twenty-one thousand, four hundred forty-three".