520775109 has 16 divisors (see below), whose sum is σ = 772283200. Its totient is φ = 346839408.

The previous prime is 520775081. The next prime is 520775113. The reversal of 520775109 is 901577025.

It is not a de Polignac number, because 520775109 - 2⁷ = 520774981 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520775119) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19842 + ... + 37884.

It is an arithmetic number, because the mean of its divisors is an integer number (48267700).

Almost surely, 2^520775109 is an apocalyptic number.

It is an amenable number.

520775109 is a deficient number, since it is larger than the sum of its proper divisors (251508091).

520775109 is a wasteful number, since it uses less digits than its factorization.

520775109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19121 (or 19115 counting only the distinct ones).

The product of its (nonzero) digits is 22050, while the sum is 36.

The square root of 520775109 is about 22820.4975624985. The cubic root of 520775109 is about 804.5445047337.

The spelling of 520775109 in words is "five hundred twenty million, seven hundred seventy-five thousand, one hundred nine".