520442663 has 8 divisors (see below), whose sum is σ = 578557056. Its totient is φ = 464911200.

The previous prime is 520442621. The next prime is 520442687. The reversal of 520442663 is 366244025.

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

It is not a de Polignac number, because 520442663 - 2²⁴ = 503665447 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520444663) 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, 645308 + ... + 646113.

It is an arithmetic number, because the mean of its divisors is an integer number (72319632).

Almost surely, 2^520442663 is an apocalyptic number.

520442663 is a deficient number, since it is larger than the sum of its proper divisors (58114393).

520442663 is a wasteful number, since it uses less digits than its factorization.

520442663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1291465.

The product of its (nonzero) digits is 34560, while the sum is 32.

The square root of 520442663 is about 22813.2124655867. The cubic root of 520442663 is about 804.3732698876.

Adding to 520442663 its reverse (366244025), we get a palindrome (886686688).

The spelling of 520442663 in words is "five hundred twenty million, four hundred forty-two thousand, six hundred sixty-three".