520522505 has 4 divisors (see below), whose sum is σ = 624627012. Its totient is φ = 416418000.

The previous prime is 520522501. The next prime is 520522529. The reversal of 520522505 is 505225025.

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 407716864 + 112805641 = 20192^2 + 10621^2 .

It is not a de Polignac number, because 520522505 - 2² = 520522501 is a prime.

It is a super-2 number, since 2×520522505² = 541887356422950050, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (520522501) 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, 52052246 + ... + 52052255.

It is an arithmetic number, because the mean of its divisors is an integer number (156156753).

Almost surely, 2^520522505 is an apocalyptic number.

It is an amenable number.

520522505 is a deficient number, since it is larger than the sum of its proper divisors (104104507).

520522505 is a wasteful number, since it uses less digits than its factorization.

520522505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104104506.

The product of its (nonzero) digits is 5000, while the sum is 26.

The square root of 520522505 is about 22814.9623054696. The cubic root of 520522505 is about 804.4144012112.

The spelling of 520522505 in words is "five hundred twenty million, five hundred twenty-two thousand, five hundred five".