520205652 has 42 divisors (see below), whose sum is σ = 1364923098. Its totient is φ = 173400912.

The previous prime is 520205633. The next prime is 520205689. The reversal of 520205652 is 256502025.

520205652 is a `hidden beast` number, since 5 + 2 + 0 + 2 + 0 + 5 + 652 = 666.

It can be written as a sum of positive squares in only one way, i.e., 516834756 + 3370896 = 22734^2 + 1836^2 .

It is a super-3 number, since 3×520205652³ (a number of 27 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 86283 + ... + 92114.

It is an arithmetic number, because the mean of its divisors is an integer number (32498169).

Almost surely, 2^520205652 is an apocalyptic number.

It is an amenable number.

520205652 is an abundant number, since it is smaller than the sum of its proper divisors (844717446).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

520205652 is a wasteful number, since it uses less digits than its factorization.

520205652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178419 (or 178402 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 27.

The square root of 520205652 is about 22808.0172746339. The cubic root of 520205652 is about 804.2511467579.

Adding to 520205652 its reverse (256502025), we get a palindrome (776707677).

The spelling of 520205652 in words is "five hundred twenty million, two hundred five thousand, six hundred fifty-two".