422221 has 4 divisors (see below), whose sum is σ = 427392. Its totient is φ = 417052.

The previous prime is 422209. The next prime is 422231. The reversal of 422221 is 122224.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 422221 - 2⁹ = 421709 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (422231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2461 + ... + 2626.

It is an arithmetic number, because the mean of its divisors is an integer number (106848).

2⁴²²²²¹ is an apocalyptic number.

It is an amenable number.

422221 is a deficient number, since it is larger than the sum of its proper divisors (5171).

422221 is an equidigital number, since it uses as much as digits as its factorization.

422221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5170.

The product of its digits is 64, while the sum is 13.

The square root of 422221 is about 649.7853491731. The cubic root of 422221 is about 75.0204981009.

Adding to 422221 its reverse (122224), we get a palindrome (544445).

The spelling of 422221 in words is "four hundred twenty-two thousand, two hundred twenty-one", and thus it is an iban number.