520531133 has 4 divisors (see below), whose sum is σ = 534599580. Its totient is φ = 506462688.

The previous prime is 520531129. The next prime is 520531171. The reversal of 520531133 is 331135025.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 257377849 + 263153284 = 16043^2 + 16222^2 .

It is a cyclic number.

It is not a de Polignac number, because 520531133 - 2² = 520531129 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 520531099 and 520531108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520530133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7034168 + ... + 7034241.

It is an arithmetic number, because the mean of its divisors is an integer number (133649895).

Almost surely, 2^520531133 is an apocalyptic number.

It is an amenable number.

520531133 is a deficient number, since it is larger than the sum of its proper divisors (14068447).

520531133 is a wasteful number, since it uses less digits than its factorization.

520531133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14068446.

The product of its (nonzero) digits is 1350, while the sum is 23.

The square root of 520531133 is about 22815.1513911260. The cubic root of 520531133 is about 804.4188457511.

Adding to 520531133 its reverse (331135025), we get a palindrome (851666158).

The spelling of 520531133 in words is "five hundred twenty million, five hundred thirty-one thousand, one hundred thirty-three".