521552 has 20 divisors (see below), whose sum is σ = 1038996. Its totient is φ = 253440.

The previous prime is 521551. The next prime is 521557. The reversal of 521552 is 255125.

It can be written as a sum of positive squares in 2 ways, for example, as 287296 + 234256 = 536^2 + 484^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (521551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 152 + ... + 1032.

2⁵²¹⁵⁵² is an apocalyptic number.

It is an amenable number.

521552 is a deficient number, since it is larger than the sum of its proper divisors (517444).

521552 is a wasteful number, since it uses less digits than its factorization.

521552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 926 (or 920 counting only the distinct ones).

The product of its digits is 500, while the sum is 20.

The square root of 521552 is about 722.1855717196. The cubic root of 521552 is about 80.4944378447.

Adding to 521552 its reverse (255125), we get a palindrome (776677).

The spelling of 521552 in words is "five hundred twenty-one thousand, five hundred fifty-two".