422204021 has 8 divisors (see below), whose sum is σ = 426783840. Its totient is φ = 417646512.

The previous prime is 422203981. The next prime is 422204023. The reversal of 422204021 is 120402224.

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 a de Polignac number, because none of the positive numbers 2^k-422204021 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 (422204023) 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, 33971 + ... + 44703.

It is an arithmetic number, because the mean of its divisors is an integer number (53347980).

Almost surely, 2^422204021 is an apocalyptic number.

It is an amenable number.

422204021 is a deficient number, since it is larger than the sum of its proper divisors (4579819).

422204021 is a wasteful number, since it uses less digits than its factorization.

422204021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11155.

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

The square root of 422204021 is about 20547.6037775698. The cubic root of 422204021 is about 750.1949247421.

Adding to 422204021 its reverse (120402224), we get a palindrome (542606245).

The spelling of 422204021 in words is "four hundred twenty-two million, two hundred four thousand, twenty-one".