520531213 has 2 divisors, whose sum is σ = 520531214. Its totient is φ = 520531212.

The previous prime is 520531189. The next prime is 520531247. The reversal of 520531213 is 312135025.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 306845289 + 213685924 = 17517^2 + 14618^2 .

It is a cyclic number.

It is not a de Polignac number, because 520531213 - 2⁵ = 520531181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (520532213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260265606 + 260265607.

It is an arithmetic number, because the mean of its divisors is an integer number (260265607).

Almost surely, 2^520531213 is an apocalyptic number.

It is an amenable number.

520531213 is a deficient number, since it is larger than the sum of its proper divisors (1).

520531213 is an equidigital number, since it uses as much as digits as its factorization.

520531213 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 900, while the sum is 22.

The square root of 520531213 is about 22815.1531443469. The cubic root of 520531213 is about 804.4188869612.

Adding to 520531213 its reverse (312135025), we get a palindrome (832666238).

It can be divided in two parts, 520 and 531213, that multiplied together give a triangular number (276230760 = T₂₃₅₀₄).

The spelling of 520531213 in words is "five hundred twenty million, five hundred thirty-one thousand, two hundred thirteen".