324240021 has 12 divisors (see below), whose sum is σ = 535253472. Its totient is φ = 185279976.

The previous prime is 324239989. The next prime is 324240029. The reversal of 324240021 is 120042423.

324240021 is a `hidden beast` number, since 3 + 242 + 400 + 21 = 666.

It is not a de Polignac number, because 324240021 - 2⁵ = 324239989 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 324239976 and 324240003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (324240029) 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 11 ways as a sum of consecutive naturals, for example, 2573271 + ... + 2573396.

It is an arithmetic number, because the mean of its divisors is an integer number (44604456).

Almost surely, 2^324240021 is an apocalyptic number.

It is an amenable number.

324240021 is a deficient number, since it is larger than the sum of its proper divisors (211013451).

324240021 is a wasteful number, since it uses less digits than its factorization.

324240021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5146680 (or 5146677 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 324240021 is about 18006.6660156732. Note that the first 3 decimals coincide. The cubic root of 324240021 is about 686.9981058026.

Adding to 324240021 its reverse (120042423), we get a palindrome (444282444).

The spelling of 324240021 in words is "three hundred twenty-four million, two hundred forty thousand, twenty-one".