521530832 has 40 divisors (see below), whose sum is σ = 1046537184. Its totient is φ = 251604864.

The previous prime is 521530831. The next prime is 521530853. The reversal of 521530832 is 238035125.

It is a super-2 number, since 2×521530832² = 543988817453224448, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 521530795 and 521530804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (521530831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52538 + ... + 61670.

Almost surely, 2^521530832 is an apocalyptic number.

It is an amenable number.

521530832 is an abundant number, since it is smaller than the sum of its proper divisors (525006352).

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

521530832 is a wasteful number, since it uses less digits than its factorization.

521530832 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9267 (or 9261 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 29.

The square root of 521530832 is about 22837.0495467344. The cubic root of 521530832 is about 804.9334883257.

Adding to 521530832 its reverse (238035125), we get a palindrome (759565957).

The spelling of 521530832 in words is "five hundred twenty-one million, five hundred thirty thousand, eight hundred thirty-two".