520255523 has 4 divisors (see below), whose sum is σ = 525619080. Its totient is φ = 514891968.

The previous prime is 520255513. The next prime is 520255559. The reversal of 520255523 is 325552025.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 520255523 - 2⁶ = 520255459 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (520255513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2681633 + ... + 2681826.

It is an arithmetic number, because the mean of its divisors is an integer number (131404770).

Almost surely, 2^520255523 is an apocalyptic number.

520255523 is a deficient number, since it is larger than the sum of its proper divisors (5363557).

520255523 is an equidigital number, since it uses as much as digits as its factorization.

520255523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5363556.

The product of its (nonzero) digits is 15000, while the sum is 29.

The square root of 520255523 is about 22809.1105262787. The cubic root of 520255523 is about 804.2768465474.

The spelling of 520255523 in words is "five hundred twenty million, two hundred fifty-five thousand, five hundred twenty-three".