520021133 has 4 divisors (see below), whose sum is σ = 523135200. Its totient is φ = 516907068.

The previous prime is 520021093. The next prime is 520021189. The reversal of 520021133 is 331120025.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 520021133 - 2²⁰ = 518972557 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520021433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1556783 + ... + 1557116.

It is an arithmetic number, because the mean of its divisors is an integer number (130783800).

Almost surely, 2^520021133 is an apocalyptic number.

It is an amenable number.

520021133 is a deficient number, since it is larger than the sum of its proper divisors (3114067).

520021133 is a wasteful number, since it uses less digits than its factorization.

520021133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3114066.

The product of its (nonzero) digits is 180, while the sum is 17.

The square root of 520021133 is about 22803.9718689530. The cubic root of 520021133 is about 804.1560451597.

Adding to 520021133 its reverse (331120025), we get a palindrome (851141158).

It can be divided in two parts, 52002 and 1133, that added together give a palindrome (53135).

The spelling of 520021133 in words is "five hundred twenty million, twenty-one thousand, one hundred thirty-three".