422400221 has 8 divisors (see below), whose sum is σ = 441404160. Its totient is φ = 403449552.

The previous prime is 422400211. The next prime is 422400239. The reversal of 422400221 is 122004224.

It is a happy number.

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 422400221 - 2⁶ = 422400157 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 422400221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (422400211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3356 + ... + 29258.

It is an arithmetic number, because the mean of its divisors is an integer number (55175520).

Almost surely, 2^422400221 is an apocalyptic number.

It is an amenable number.

422400221 is a deficient number, since it is larger than the sum of its proper divisors (19003939).

422400221 is a wasteful number, since it uses less digits than its factorization.

422400221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26635.

The product of its (nonzero) digits is 256, while the sum is 17.

The square root of 422400221 is about 20552.3775023718. The cubic root of 422400221 is about 750.3111130012.

Adding to 422400221 its reverse (122004224), we get a palindrome (544404445).

The spelling of 422400221 in words is "four hundred twenty-two million, four hundred thousand, two hundred twenty-one".