520256447 has 2 divisors, whose sum is σ = 520256448. Its totient is φ = 520256446.

The previous prime is 520256411. The next prime is 520256449. The reversal of 520256447 is 744652025.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 520256447 - 2¹² = 520252351 is a prime.

Together with 520256449, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (520256449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260128223 + 260128224.

It is an arithmetic number, because the mean of its divisors is an integer number (260128224).

Almost surely, 2^520256447 is an apocalyptic number.

520256447 is a deficient number, since it is larger than the sum of its proper divisors (1).

520256447 is an equidigital number, since it uses as much as digits as its factorization.

520256447 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 67200, while the sum is 35.

The square root of 520256447 is about 22809.1307813340. The cubic root of 520256447 is about 804.2773226925.

The spelling of 520256447 in words is "five hundred twenty million, two hundred fifty-six thousand, four hundred forty-seven".