422552621 has 2 divisors, whose sum is σ = 422552622. Its totient is φ = 422552620.

The previous prime is 422552579. The next prime is 422552639. The reversal of 422552621 is 126255224.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 351150121 + 71402500 = 18739^2 + 8450^2 .

It is a cyclic number.

It is not a de Polignac number, because 422552621 - 2²⁶ = 355443757 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (422552671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211276310 + 211276311.

It is an arithmetic number, because the mean of its divisors is an integer number (211276311).

Almost surely, 2^422552621 is an apocalyptic number.

It is an amenable number.

422552621 is a deficient number, since it is larger than the sum of its proper divisors (1).

422552621 is an equidigital number, since it uses as much as digits as its factorization.

422552621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9600, while the sum is 29.

The square root of 422552621 is about 20556.0847682627. The cubic root of 422552621 is about 750.4013383835.

The spelling of 422552621 in words is "four hundred twenty-two million, five hundred fifty-two thousand, six hundred twenty-one".