520165057 has 2 divisors, whose sum is σ = 520165058. Its totient is φ = 520165056.

The previous prime is 520165013. The next prime is 520165081. The reversal of 520165057 is 750561025.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 435598641 + 84566416 = 20871^2 + 9196^2 .

It is a cyclic number.

It is not a de Polignac number, because 520165057 - 2¹⁹ = 519640769 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (520162057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260082528 + 260082529.

It is an arithmetic number, because the mean of its divisors is an integer number (260082529).

Almost surely, 2^520165057 is an apocalyptic number.

It is an amenable number.

520165057 is a deficient number, since it is larger than the sum of its proper divisors (1).

520165057 is an equidigital number, since it uses as much as digits as its factorization.

520165057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10500, while the sum is 31.

The square root of 520165057 is about 22807.1273289733. The cubic root of 520165057 is about 804.2302259135.

The spelling of 520165057 in words is "five hundred twenty million, one hundred sixty-five thousand, fifty-seven".