520531171 has 2 divisors, whose sum is σ = 520531172. Its totient is φ = 520531170.

The previous prime is 520531129. The next prime is 520531181. The reversal of 520531171 is 171135025.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 520531171 - 2²³ = 512142563 is a prime.

It is not a weakly prime, because it can be changed into another prime (520531111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260265585 + 260265586.

It is an arithmetic number, because the mean of its divisors is an integer number (260265586).

Almost surely, 2^520531171 is an apocalyptic number.

520531171 is a deficient number, since it is larger than the sum of its proper divisors (1).

520531171 is an equidigital number, since it uses as much as digits as its factorization.

520531171 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1050, while the sum is 25.

The square root of 520531171 is about 22815.1522239059. The cubic root of 520531171 is about 804.4188653259.

Adding to 520531171 its reverse (171135025), we get a palindrome (691666196).

The spelling of 520531171 in words is "five hundred twenty million, five hundred thirty-one thousand, one hundred seventy-one".