520005223813 has 2 divisors, whose sum is σ = 520005223814. Its totient is φ = 520005223812.

The previous prime is 520005223789. The next prime is 520005223819. The reversal of 520005223813 is 318322500025.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 493502035009 + 26503188804 = 702497^2 + 162798^2 .

It is a cyclic number.

It is not a de Polignac number, because 520005223813 - 2²⁵ = 519971669381 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (520005223819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260002611906 + 260002611907.

It is an arithmetic number, because the mean of its divisors is an integer number (260002611907).

Almost surely, 2^520005223813 is an apocalyptic number.

It is an amenable number.

520005223813 is a deficient number, since it is larger than the sum of its proper divisors (1).

520005223813 is an equidigital number, since it uses as much as digits as its factorization.

520005223813 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14400, while the sum is 31.

Adding to 520005223813 its reverse (318322500025), we get a palindrome (838327723838).

The spelling of 520005223813 in words is "five hundred twenty billion, five million, two hundred twenty-three thousand, eight hundred thirteen".