521312532 has 96 divisors (see below), whose sum is σ = 1353472512. Its totient is φ = 155160576.

The previous prime is 521312513. The next prime is 521312587. The reversal of 521312532 is 235213125.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 710838 + ... + 711570.

It is an arithmetic number, because the mean of its divisors is an integer number (14098672).

Almost surely, 2^521312532 is an apocalyptic number.

521312532 is a gapful number since it is divisible by the number (52) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 521312532, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (676736256).

521312532 is an abundant number, since it is smaller than the sum of its proper divisors (832159980).

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

521312532 is a wasteful number, since it uses less digits than its factorization.

521312532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 897 (or 895 counting only the distinct ones).

The product of its digits is 1800, while the sum is 24.

The square root of 521312532 is about 22832.2695323965. The cubic root of 521312532 is about 804.8211641879.

Adding to 521312532 its reverse (235213125), we get a palindrome (756525657).

The spelling of 521312532 in words is "five hundred twenty-one million, three hundred twelve thousand, five hundred thirty-two".