422204921 has 6 divisors (see below), whose sum is σ = 432637422. Its totient is φ = 411778880.

The previous prime is 422204879. The next prime is 422204933. The reversal of 422204921 is 129402224.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 12709225 + 409495696 = 3565^2 + 20236^2 .

It is not a de Polignac number, because 422204921 - 2⁶ = 422204857 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (422204971) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 129965 + ... + 133173.

It is an arithmetic number, because the mean of its divisors is an integer number (72106237).

Almost surely, 2^422204921 is an apocalyptic number.

422204921 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

It is an amenable number.

422204921 is a deficient number, since it is larger than the sum of its proper divisors (10432501).

422204921 is an frugal number, since it uses more digits than its factorization.

422204921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6459 (or 3250 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 422204921 is about 20547.6256779220. The cubic root of 422204921 is about 750.1954577980.

The spelling of 422204921 in words is "four hundred twenty-two million, two hundred four thousand, nine hundred twenty-one".