520143823 has 8 divisors (see below), whose sum is σ = 546024960. Its totient is φ = 494831640.

The previous prime is 520143803. The next prime is 520143851. The reversal of 520143823 is 328341025.

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

It is a cyclic number.

It is not a de Polignac number, because 520143823 - 2¹⁷ = 520012751 is a prime.

It is a Duffinian number.

It is a zygodrome in base 2.

It is a junction number, because it is equal to n+sod(n) for n = 520143791 and 520143800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520143803) 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, 140365 + ... + 144022.

It is an arithmetic number, because the mean of its divisors is an integer number (68253120).

Almost surely, 2^520143823 is an apocalyptic number.

520143823 is a deficient number, since it is larger than the sum of its proper divisors (25881137).

520143823 is a wasteful number, since it uses less digits than its factorization.

520143823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 284477.

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 520143823 is about 22806.6618118479. The cubic root of 520143823 is about 804.2192824275.

Adding to 520143823 its reverse (328341025), we get a palindrome (848484848).

The spelling of 520143823 in words is "five hundred twenty million, one hundred forty-three thousand, eight hundred twenty-three".