521324340 has 24 divisors (see below), whose sum is σ = 1459708320. Its totient is φ = 139019808.

The previous prime is 521324333. The next prime is 521324347. The reversal of 521324340 is 43423125.

It is an interprime number because it is at equal distance from previous prime (521324333) and next prime (521324347).

It is a self number, because there is not a number n which added to its sum of digits gives 521324340.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (521324347) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4344310 + ... + 4344429.

It is an arithmetic number, because the mean of its divisors is an integer number (60821180).

Almost surely, 2^521324340 is an apocalyptic number.

It is an amenable number.

521324340 is an abundant number, since it is smaller than the sum of its proper divisors (938383980).

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

521324340 is a wasteful number, since it uses less digits than its factorization.

521324340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8688751 (or 8688749 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 24.

The square root of 521324340 is about 22832.5281123226. The cubic root of 521324340 is about 804.8272406813.

Adding to 521324340 its reverse (43423125), we get a palindrome (564747465).

The spelling of 521324340 in words is "five hundred twenty-one million, three hundred twenty-four thousand, three hundred forty".