422216321 has 4 divisors (see below), whose sum is σ = 423302100. Its totient is φ = 421130544.

The previous prime is 422216297. The next prime is 422216351. The reversal of 422216321 is 123612224.

It is a happy number.

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 133726096 + 288490225 = 11564^2 + 16985^2 .

It is a cyclic number.

It is not a de Polignac number, because 422216321 - 2¹⁸ = 421954177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (422216351) 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, 542306 + ... + 543083.

It is an arithmetic number, because the mean of its divisors is an integer number (105825525).

Almost surely, 2^422216321 is an apocalyptic number.

It is an amenable number.

422216321 is a deficient number, since it is larger than the sum of its proper divisors (1085779).

422216321 is a wasteful number, since it uses less digits than its factorization.

422216321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1085778.

The product of its digits is 1152, while the sum is 23.

The square root of 422216321 is about 20547.9030803632. The cubic root of 422216321 is about 750.2022097730.

Adding to 422216321 its reverse (123612224), we get a palindrome (545828545).

The spelling of 422216321 in words is "four hundred twenty-two million, two hundred sixteen thousand, three hundred twenty-one".