520345303 has 8 divisors (see below), whose sum is σ = 525484800. Its totient is φ = 515230968.

The previous prime is 520345291. The next prime is 520345313. The reversal of 520345303 is 303543025.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-520345303 is a prime.

It is a super-5 number, since 5×520345303⁵ (a number of 45 digits) contains 55555 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520345313) 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, 36700 + ... + 48862.

It is an arithmetic number, because the mean of its divisors is an integer number (65685600).

Almost surely, 2^520345303 is an apocalyptic number.

520345303 is a deficient number, since it is larger than the sum of its proper divisors (5139497).

520345303 is a wasteful number, since it uses less digits than its factorization.

520345303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12581.

The product of its (nonzero) digits is 5400, while the sum is 25.

The square root of 520345303 is about 22811.0785146165. The cubic root of 520345303 is about 804.3231083162.

Adding to 520345303 its reverse (303543025), we get a palindrome (823888328).

The spelling of 520345303 in words is "five hundred twenty million, three hundred forty-five thousand, three hundred three".