422842221 has 16 divisors (see below), whose sum is σ = 639763200. Its totient is φ = 275896224.

The previous prime is 422842219. The next prime is 422842229. The reversal of 422842221 is 122248224.

It is not a de Polignac number, because 422842221 - 2¹ = 422842219 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (422842229) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 165336 + ... + 167873.

It is an arithmetic number, because the mean of its divisors is an integer number (39985200).

Almost surely, 2^422842221 is an apocalyptic number.

It is an amenable number.

422842221 is a deficient number, since it is larger than the sum of its proper divisors (216920979).

422842221 is a wasteful number, since it uses less digits than its factorization.

422842221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 333265 (or 333259 counting only the distinct ones).

The product of its digits is 4096, while the sum is 27.

The square root of 422842221 is about 20563.1277047048. The cubic root of 422842221 is about 750.5727305283.

The spelling of 422842221 in words is "four hundred twenty-two million, eight hundred forty-two thousand, two hundred twenty-one".