520022813 has 2 divisors, whose sum is σ = 520022814. Its totient is φ = 520022812.

The previous prime is 520022777. The next prime is 520022857. The reversal of 520022813 is 318220025.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 485893849 + 34128964 = 22043^2 + 5842^2 .

It is a cyclic number.

It is not a de Polignac number, because 520022813 - 2⁶ = 520022749 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (520022413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260011406 + 260011407.

It is an arithmetic number, because the mean of its divisors is an integer number (260011407).

Almost surely, 2^520022813 is an apocalyptic number.

It is an amenable number.

520022813 is a deficient number, since it is larger than the sum of its proper divisors (1).

520022813 is an equidigital number, since it uses as much as digits as its factorization.

520022813 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 520022813 is about 22804.0087046116. The cubic root of 520022813 is about 804.1569111377.

Adding to 520022813 its reverse (318220025), we get a palindrome (838242838).

The spelling of 520022813 in words is "five hundred twenty million, twenty-two thousand, eight hundred thirteen".