520045257 has 16 divisors (see below), whose sum is σ = 732080960. Its totient is φ = 327462912.

The previous prime is 520045199. The next prime is 520045259. The reversal of 520045257 is 752540025.

It is not a de Polignac number, because 520045257 - 2¹⁰ = 520044233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (520045259) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5673 + ... + 32745.

It is an arithmetic number, because the mean of its divisors is an integer number (45755060).

Almost surely, 2^520045257 is an apocalyptic number.

520045257 is a gapful number since it is divisible by the number (57) formed by its first and last digit.

It is an amenable number.

520045257 is a deficient number, since it is larger than the sum of its proper divisors (212035703).

520045257 is a wasteful number, since it uses less digits than its factorization.

520045257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27432.

The product of its (nonzero) digits is 14000, while the sum is 30.

The square root of 520045257 is about 22804.5008057620. The cubic root of 520045257 is about 804.1684800136.

The spelling of 520045257 in words is "five hundred twenty million, forty-five thousand, two hundred fifty-seven".