324242021 has 4 divisors (see below), whose sum is σ = 325278252. Its totient is φ = 323205792.

The previous prime is 324241999. The next prime is 324242027. The reversal of 324242021 is 120242423.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 10562500 + 313679521 = 3250^2 + 17711^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-324242021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 324241984 and 324242002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (324242027) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 517646 + ... + 518271.

It is an arithmetic number, because the mean of its divisors is an integer number (81319563).

Almost surely, 2^324242021 is an apocalyptic number.

It is an amenable number.

324242021 is a deficient number, since it is larger than the sum of its proper divisors (1036231).

324242021 is a wasteful number, since it uses less digits than its factorization.

324242021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1036230.

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 324242021 is about 18006.7215505766. The cubic root of 324242021 is about 686.9995183296. Note that the first 3 decimals are identical.

Adding to 324242021 its reverse (120242423), we get a palindrome (444484444).

The spelling of 324242021 in words is "three hundred twenty-four million, two hundred forty-two thousand, twenty-one".