520205113 has 2 divisors, whose sum is σ = 520205114. Its totient is φ = 520205112.

The previous prime is 520205111. The next prime is 520205129. The reversal of 520205113 is 311502025.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 392356864 + 127848249 = 19808^2 + 11307^2 .

It is a cyclic number.

It is not a de Polignac number, because 520205113 - 2¹ = 520205111 is a prime.

It is a super-2 number, since 2×520205113² = 541226719182685538, which contains 22 as substring.

Together with 520205111, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (520205111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260102556 + 260102557.

It is an arithmetic number, because the mean of its divisors is an integer number (260102557).

Almost surely, 2^520205113 is an apocalyptic number.

It is an amenable number.

520205113 is a deficient number, since it is larger than the sum of its proper divisors (1).

520205113 is an equidigital number, since it uses as much as digits as its factorization.

520205113 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 300, while the sum is 19.

The square root of 520205113 is about 22808.0054586104. The cubic root of 520205113 is about 804.2508689886.

Adding to 520205113 its reverse (311502025), we get a palindrome (831707138).

The spelling of 520205113 in words is "five hundred twenty million, two hundred five thousand, one hundred thirteen".