520331857 has 2 divisors, whose sum is σ = 520331858. Its totient is φ = 520331856.

The previous prime is 520331843. The next prime is 520331873. The reversal of 520331857 is 758133025.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 434972736 + 85359121 = 20856^2 + 9239^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-520331857 is a prime.

It is not a weakly prime, because it can be changed into another prime (520331837) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260165928 + 260165929.

It is an arithmetic number, because the mean of its divisors is an integer number (260165929).

Almost surely, 2^520331857 is an apocalyptic number.

It is an amenable number.

520331857 is a deficient number, since it is larger than the sum of its proper divisors (1).

520331857 is an equidigital number, since it uses as much as digits as its factorization.

520331857 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25200, while the sum is 34.

The square root of 520331857 is about 22810.7837874984. The cubic root of 520331857 is about 804.3161802105.

The spelling of 520331857 in words is "five hundred twenty million, three hundred thirty-one thousand, eight hundred fifty-seven".