520865943 has 48 divisors (see below), whose sum is σ = 799344000. Its totient is φ = 300703104.

The previous prime is 520865899. The next prime is 520865951. The reversal of 520865943 is 349568025.

It is not a de Polignac number, because 520865943 - 2⁶ = 520865879 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 520865895 and 520865904.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520865993) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1338793 + ... + 1339181.

It is an arithmetic number, because the mean of its divisors is an integer number (16653000).

Almost surely, 2^520865943 is an apocalyptic number.

520865943 is a deficient number, since it is larger than the sum of its proper divisors (278478057).

520865943 is a wasteful number, since it uses less digits than its factorization.

520865943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 576 (or 563 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 42.

The square root of 520865943 is about 22822.4876602004. The cubic root of 520865943 is about 804.5912784407.

The spelling of 520865943 in words is "five hundred twenty million, eight hundred sixty-five thousand, nine hundred forty-three".