422534221 has 4 divisors (see below), whose sum is σ = 422628444. Its totient is φ = 422440000.

The previous prime is 422534213. The next prime is 422534237. The reversal of 422534221 is 122435224.

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

It can be written as a sum of positive squares in 2 ways, for example, as 356680996 + 65853225 = 18886^2 + 8115^2 .

It is a cyclic number.

It is not a de Polignac number, because 422534221 - 2³ = 422534213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (422534261) 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, 40030 + ... + 49471.

It is an arithmetic number, because the mean of its divisors is an integer number (105657111).

Almost surely, 2^422534221 is an apocalyptic number.

It is an amenable number.

422534221 is a deficient number, since it is larger than the sum of its proper divisors (94223).

422534221 is an equidigital number, since it uses as much as digits as its factorization.

422534221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94222.

The product of its digits is 3840, while the sum is 25.

The square root of 422534221 is about 20555.6372073453. The cubic root of 422534221 is about 750.3904461819.

Adding to 422534221 its reverse (122435224), we get a palindrome (544969445).

The spelling of 422534221 in words is "four hundred twenty-two million, five hundred thirty-four thousand, two hundred twenty-one".