622431613 has 2 divisors, whose sum is σ = 622431614. Its totient is φ = 622431612.

The previous prime is 622431581. The next prime is 622431631. The reversal of 622431613 is 316134226.

Together with next prime (622431631) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 557998884 + 64432729 = 23622^2 + 8027^2 .

It is a cyclic number.

It is not a de Polignac number, because 622431613 - 2⁵ = 622431581 is a prime.

It is a super-2 number, since 2×622431613² = 774842225723563538, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (622434613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 311215806 + 311215807.

It is an arithmetic number, because the mean of its divisors is an integer number (311215807).

Almost surely, 2^622431613 is an apocalyptic number.

It is an amenable number.

622431613 is a deficient number, since it is larger than the sum of its proper divisors (1).

622431613 is an equidigital number, since it uses as much as digits as its factorization.

622431613 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5184, while the sum is 28.

The square root of 622431613 is about 24948.5793783935. The cubic root of 622431613 is about 853.8151973945.

Adding to 622431613 its reverse (316134226), we get a palindrome (938565839).

The spelling of 622431613 in words is "six hundred twenty-two million, four hundred thirty-one thousand, six hundred thirteen".