520985311 has 16 divisors (see below), whose sum is σ = 652474368. Its totient is φ = 404128800.

The previous prime is 520985299. The next prime is 520985317. The reversal of 520985311 is 113589025.

It is a cyclic number.

It is not a de Polignac number, because 520985311 - 2⁵ = 520985279 is a prime.

It is a super-4 number, since 4×520985311⁴ (a number of 36 digits) contains 4444 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520985317) 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 15 ways as a sum of consecutive naturals, for example, 2001 + ... + 32341.

It is an arithmetic number, because the mean of its divisors is an integer number (40779648).

Almost surely, 2^520985311 is an apocalyptic number.

520985311 is a deficient number, since it is larger than the sum of its proper divisors (131489057).

520985311 is a wasteful number, since it uses less digits than its factorization.

520985311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30582.

The product of its (nonzero) digits is 10800, while the sum is 34.

The square root of 520985311 is about 22825.1026503716. The cubic root of 520985311 is about 804.6527370669.

The spelling of 520985311 in words is "five hundred twenty million, nine hundred eighty-five thousand, three hundred eleven".