520013205 has 24 divisors (see below), whose sum is σ = 911490840. Its totient is φ = 274222080.

The previous prime is 520013201. The next prime is 520013213. The reversal of 520013205 is 502310025.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 33281361 + 486731844 = 5769^2 + 22062^2 .

It is not a de Polignac number, because 520013205 - 2² = 520013201 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520013201) 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 in 23 ways as a sum of consecutive naturals, for example, 60916 + ... + 68925.

It is an arithmetic number, because the mean of its divisors is an integer number (37978785).

Almost surely, 2^520013205 is an apocalyptic number.

It is an amenable number.

520013205 is a deficient number, since it is larger than the sum of its proper divisors (391477635).

520013205 is a wasteful number, since it uses less digits than its factorization.

520013205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129941 (or 129938 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 18.

The square root of 520013205 is about 22803.7980389233. The cubic root of 520013205 is about 804.1519585427.

The spelling of 520013205 in words is "five hundred twenty million, thirteen thousand, two hundred five".