520245853 has 6 divisors (see below), whose sum is σ = 522082682. Its totient is φ = 518411760.

The previous prime is 520245841. The next prime is 520245907. The reversal of 520245853 is 358542025.

It can be written as a sum of positive squares in 3 ways, for example, as 323208484 + 197037369 = 17978^2 + 14037^2 .

It is a de Polignac number, because none of the positive numbers 2^k-520245853 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 (520245833) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 439923 + ... + 441103.

Almost surely, 2^520245853 is an apocalyptic number.

It is an amenable number.

520245853 is a deficient number, since it is larger than the sum of its proper divisors (1836829).

520245853 is an frugal number, since it uses more digits than its factorization.

520245853 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2735 (or 1554 counting only the distinct ones).

The product of its (nonzero) digits is 48000, while the sum is 34.

The square root of 520245853 is about 22808.8985485928. The cubic root of 520245853 is about 804.2718634799.

Adding to 520245853 its reverse (358542025), we get a palindrome (878787878).

The spelling of 520245853 in words is "five hundred twenty million, two hundred forty-five thousand, eight hundred fifty-three".