422564321 has 2 divisors, whose sum is σ = 422564322. Its totient is φ = 422564320.

The previous prime is 422564287. The next prime is 422564323. The reversal of 422564321 is 123465224.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 418816225 + 3748096 = 20465^2 + 1936^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-422564321 is a prime.

Together with 422564323, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (422564323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211282160 + 211282161.

It is an arithmetic number, because the mean of its divisors is an integer number (211282161).

Almost surely, 2^422564321 is an apocalyptic number.

It is an amenable number.

422564321 is a deficient number, since it is larger than the sum of its proper divisors (1).

422564321 is an equidigital number, since it uses as much as digits as its factorization.

422564321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11520, while the sum is 29.

The square root of 422564321 is about 20556.3693535605. The cubic root of 422564321 is about 750.4082642386.

The spelling of 422564321 in words is "four hundred twenty-two million, five hundred sixty-four thousand, three hundred twenty-one".