520520005 has 4 divisors (see below), whose sum is σ = 624624012. Its totient is φ = 416416000.

The previous prime is 520519973. The next prime is 520520009. The reversal of 520520005 is 500025025.

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

It can be written as a sum of positive squares in 2 ways, for example, as 124947684 + 395572321 = 11178^2 + 19889^2 .

It is not a de Polignac number, because 520520005 - 2⁵ = 520519973 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520520009) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52051996 + ... + 52052005.

It is an arithmetic number, because the mean of its divisors is an integer number (156156003).

Almost surely, 2^520520005 is an apocalyptic number.

It is an amenable number.

520520005 is a deficient number, since it is larger than the sum of its proper divisors (104104007).

520520005 is a wasteful number, since it uses less digits than its factorization.

520520005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104104006.

The product of its (nonzero) digits is 500, while the sum is 19.

The square root of 520520005 is about 22814.9075167970. The cubic root of 520520005 is about 804.4131133775.

The spelling of 520520005 in words is "five hundred twenty million, five hundred twenty thousand, five".