422565217 has 2 divisors, whose sum is σ = 422565218. Its totient is φ = 422565216.

The previous prime is 422565211. The next prime is 422565289. The reversal of 422565217 is 712565224.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 322884961 + 99680256 = 17969^2 + 9984^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-422565217 is a prime.

It is a super-2 number, since 2×422565217² = 357122725236514178, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (422565211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211282608 + 211282609.

It is an arithmetic number, because the mean of its divisors is an integer number (211282609).

Almost surely, 2^422565217 is an apocalyptic number.

It is an amenable number.

422565217 is a deficient number, since it is larger than the sum of its proper divisors (1).

422565217 is an equidigital number, since it uses as much as digits as its factorization.

422565217 is an evil number, because the sum of its binary digits is even.

The product of its digits is 33600, while the sum is 34.

The square root of 422565217 is about 20556.3911472807. The cubic root of 422565217 is about 750.4087946236.

The spelling of 422565217 in words is "four hundred twenty-two million, five hundred sixty-five thousand, two hundred seventeen".