520551 has 6 divisors (see below), whose sum is σ = 751920. Its totient is φ = 347028.

The previous prime is 520549. The next prime is 520567. The reversal of 520551 is 155025.

It is not a de Polignac number, because 520551 - 2¹ = 520549 is a prime.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 520551.

It is not an unprimeable number, because it can be changed into a prime (520571) 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 5 ways as a sum of consecutive naturals, for example, 28911 + ... + 28928.

It is an arithmetic number, because the mean of its divisors is an integer number (125320).

2⁵²⁰⁵⁵¹ is an apocalyptic number.

520551 is a deficient number, since it is larger than the sum of its proper divisors (231369).

520551 is a wasteful number, since it uses less digits than its factorization.

520551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57845 (or 57842 counting only the distinct ones).

The product of its (nonzero) digits is 250, while the sum is 18.

The square root of 520551 is about 721.4922037001. The cubic root of 520551 is about 80.4429079648.

Adding to 520551 its reverse (155025), we get a palindrome (675576).

The spelling of 520551 in words is "five hundred twenty thousand, five hundred fifty-one".