520821263 has 2 divisors, whose sum is σ = 520821264. Its totient is φ = 520821262.

The previous prime is 520821239. The next prime is 520821317. The reversal of 520821263 is 362128025.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 520821263 - 2⁶ = 520821199 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (520821563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260410631 + 260410632.

It is an arithmetic number, because the mean of its divisors is an integer number (260410632).

Almost surely, 2^520821263 is an apocalyptic number.

520821263 is a deficient number, since it is larger than the sum of its proper divisors (1).

520821263 is an equidigital number, since it uses as much as digits as its factorization.

520821263 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 520821263 is about 22821.5087800960. The cubic root of 520821263 is about 804.5682717747.

Adding to 520821263 its reverse (362128025), we get a palindrome (882949288).

The spelling of 520821263 in words is "five hundred twenty million, eight hundred twenty-one thousand, two hundred sixty-three".