422240221 has 8 divisors (see below), whose sum is σ = 455568344. Its totient is φ = 389033280.

The previous prime is 422240219. The next prime is 422240267. The reversal of 422240221 is 122042224.

It can be written as a sum of positive squares in 4 ways, for example, as 40819321 + 381420900 = 6389^2 + 19530^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 422240221 - 2¹ = 422240219 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 (422240281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22986 + ... + 37051.

It is an arithmetic number, because the mean of its divisors is an integer number (56946043).

Almost surely, 2^422240221 is an apocalyptic number.

It is an amenable number.

422240221 is a deficient number, since it is larger than the sum of its proper divisors (33328123).

422240221 is a wasteful number, since it uses less digits than its factorization.

422240221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60591.

The product of its (nonzero) digits is 512, while the sum is 19.

The square root of 422240221 is about 20548.4846399923. The cubic root of 422240221 is about 750.2163648349.

Adding to 422240221 its reverse (122042224), we get a palindrome (544282445).

The spelling of 422240221 in words is "four hundred twenty-two million, two hundred forty thousand, two hundred twenty-one".