422212997 has 2 divisors, whose sum is σ = 422212998. Its totient is φ = 422212996.

The previous prime is 422212993. The next prime is 422213017. The reversal of 422212997 is 799212224.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 296907361 + 125305636 = 17231^2 + 11194^2 .

It is a cyclic number.

It is not a de Polignac number, because 422212997 - 2² = 422212993 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 422212997.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (422212993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211106498 + 211106499.

It is an arithmetic number, because the mean of its divisors is an integer number (211106499).

Almost surely, 2^422212997 is an apocalyptic number.

It is an amenable number.

422212997 is a deficient number, since it is larger than the sum of its proper divisors (1).

422212997 is an equidigital number, since it uses as much as digits as its factorization.

422212997 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36288, while the sum is 38.

The square root of 422212997 is about 20547.8221960382. The cubic root of 422212997 is about 750.2002410518.

The spelling of 422212997 in words is "four hundred twenty-two million, two hundred twelve thousand, nine hundred ninety-seven".