520525513 has 2 divisors, whose sum is σ = 520525514. Its totient is φ = 520525512.

The previous prime is 520525483. The next prime is 520525541. The reversal of 520525513 is 315525025.

It is an a-pointer prime, because the next prime (520525541) can be obtained adding 520525513 to its sum of digits (28).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 337383424 + 183142089 = 18368^2 + 13533^2 .

It is a cyclic number.

It is not a de Polignac number, because 520525513 - 2¹³ = 520517321 is a prime.

It is not a weakly prime, because it can be changed into another prime (520525543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260262756 + 260262757.

It is an arithmetic number, because the mean of its divisors is an integer number (260262757).

Almost surely, 2^520525513 is an apocalyptic number.

It is an amenable number.

520525513 is a deficient number, since it is larger than the sum of its proper divisors (1).

520525513 is an equidigital number, since it uses as much as digits as its factorization.

520525513 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7500, while the sum is 28.

The square root of 520525513 is about 22815.0282270262. The cubic root of 520525513 is about 804.4159507272.

The spelling of 520525513 in words is "five hundred twenty million, five hundred twenty-five thousand, five hundred thirteen".