520765131 has 16 divisors (see below), whose sum is σ = 752298624. Its totient is φ = 319154304.

The previous prime is 520765117. The next prime is 520765139. The reversal of 520765131 is 131567025.

It is not a de Polignac number, because 520765131 - 2⁹ = 520764619 is a prime.

It is a super-2 number, since 2×520765131² = 542392643330894322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (520765139) 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 15 ways as a sum of consecutive naturals, for example, 116541 + ... + 120926.

It is an arithmetic number, because the mean of its divisors is an integer number (47018664).

Almost surely, 2^520765131 is an apocalyptic number.

520765131 is a gapful number since it is divisible by the number (51) formed by its first and last digit.

520765131 is a deficient number, since it is larger than the sum of its proper divisors (231533493).

520765131 is a wasteful number, since it uses less digits than its factorization.

520765131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 237530.

The product of its (nonzero) digits is 6300, while the sum is 30.

The square root of 520765131 is about 22820.2789422040. The cubic root of 520765131 is about 804.5393663696.

The spelling of 520765131 in words is "five hundred twenty million, seven hundred sixty-five thousand, one hundred thirty-one".