422163221 has 2 divisors, whose sum is σ = 422163222. Its totient is φ = 422163220.

The previous prime is 422163191. The next prime is 422163253. The reversal of 422163221 is 122361224.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 270602500 + 151560721 = 16450^2 + 12311^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-422163221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (422163271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211081610 + 211081611.

It is an arithmetic number, because the mean of its divisors is an integer number (211081611).

Almost surely, 2^422163221 is an apocalyptic number.

It is an amenable number.

422163221 is a deficient number, since it is larger than the sum of its proper divisors (1).

422163221 is an equidigital number, since it uses as much as digits as its factorization.

422163221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1152, while the sum is 23.

The square root of 422163221 is about 20546.6109370864. The cubic root of 422163221 is about 750.1707587486.

The spelling of 422163221 in words is "four hundred twenty-two million, one hundred sixty-three thousand, two hundred twenty-one".