520255289 has 2 divisors, whose sum is σ = 520255290. Its totient is φ = 520255288.

The previous prime is 520255243. The next prime is 520255303. The reversal of 520255289 is 982552025.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 449779264 + 70476025 = 21208^2 + 8395^2 .

It is a cyclic number.

It is not a de Polignac number, because 520255289 - 2⁸ = 520255033 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (520252289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260127644 + 260127645.

It is an arithmetic number, because the mean of its divisors is an integer number (260127645).

Almost surely, 2^520255289 is an apocalyptic number.

It is an amenable number.

520255289 is a deficient number, since it is larger than the sum of its proper divisors (1).

520255289 is an equidigital number, since it uses as much as digits as its factorization.

520255289 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72000, while the sum is 38.

The square root of 520255289 is about 22809.1053967489. The cubic root of 520255289 is about 804.2767259651.

The spelling of 520255289 in words is "five hundred twenty million, two hundred fifty-five thousand, two hundred eighty-nine".