520243871 has 8 divisors (see below), whose sum is σ = 595941024. Its totient is φ = 444890880.

The previous prime is 520243819. The next prime is 520243897. The reversal of 520243871 is 178342025.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-520243871 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520242871) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 82790 + ... + 88851.

It is an arithmetic number, because the mean of its divisors is an integer number (74492628).

Almost surely, 2^520243871 is an apocalyptic number.

520243871 is a deficient number, since it is larger than the sum of its proper divisors (75697153).

520243871 is a wasteful number, since it uses less digits than its factorization.

520243871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172081.

The product of its (nonzero) digits is 13440, while the sum is 32.

The square root of 520243871 is about 22808.8551005963. The cubic root of 520243871 is about 804.2708421237.

Adding to 520243871 its reverse (178342025), we get a palindrome (698585896).

The spelling of 520243871 in words is "five hundred twenty million, two hundred forty-three thousand, eight hundred seventy-one".