422521613 has 2 divisors, whose sum is σ = 422521614. Its totient is φ = 422521612.

The previous prime is 422521609. The next prime is 422521633. The reversal of 422521613 is 316125224.

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., 256704484 + 165817129 = 16022^2 + 12877^2 .

It is a cyclic number.

It is not a de Polignac number, because 422521613 - 2² = 422521609 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (422521633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211260806 + 211260807.

It is an arithmetic number, because the mean of its divisors is an integer number (211260807).

Almost surely, 2^422521613 is an apocalyptic number.

It is an amenable number.

422521613 is a deficient number, since it is larger than the sum of its proper divisors (1).

422521613 is an equidigital number, since it uses as much as digits as its factorization.

422521613 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2880, while the sum is 26.

The square root of 422521613 is about 20555.3305251947. The cubic root of 422521613 is about 750.3829824734.

Adding to 422521613 its reverse (316125224), we get a palindrome (738646837).

The spelling of 422521613 in words is "four hundred twenty-two million, five hundred twenty-one thousand, six hundred thirteen".