520512403 has 2 divisors, whose sum is σ = 520512404. Its totient is φ = 520512402.

The previous prime is 520512401. The next prime is 520512407. The reversal of 520512403 is 304215025.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 520512403 - 2¹ = 520512401 is a prime.

Together with 520512401, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (520512401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260256201 + 260256202.

It is an arithmetic number, because the mean of its divisors is an integer number (260256202).

Almost surely, 2^520512403 is an apocalyptic number.

520512403 is a deficient number, since it is larger than the sum of its proper divisors (1).

520512403 is an equidigital number, since it uses as much as digits as its factorization.

520512403 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 520512403 is about 22814.7409145929. The cubic root of 520512403 is about 804.4091973076.

Adding to 520512403 its reverse (304215025), we get a palindrome (824727428).

The spelling of 520512403 in words is "five hundred twenty million, five hundred twelve thousand, four hundred three".