324401021 has 12 divisors (see below), whose sum is σ = 399563388. Its totient is φ = 261700992.

The previous prime is 324401017. The next prime is 324401137. The reversal of 324401021 is 120104423.

It can be written as a sum of positive squares in 2 ways, for example, as 253605625 + 70795396 = 15925^2 + 8414^2 .

It is not a de Polignac number, because 324401021 - 2² = 324401017 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (324401621) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 193886 + ... + 195551.

It is an arithmetic number, because the mean of its divisors is an integer number (33296949).

Almost surely, 2^324401021 is an apocalyptic number.

It is an amenable number.

324401021 is a deficient number, since it is larger than the sum of its proper divisors (75162367).

324401021 is a wasteful number, since it uses less digits than its factorization.

324401021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 389468 (or 389461 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 324401021 is about 18011.1360274692. The cubic root of 324401021 is about 687.1117956474. Note that the first 3 decimals are identical.

Adding to 324401021 its reverse (120104423), we get a palindrome (444505444).

The spelling of 324401021 in words is "three hundred twenty-four million, four hundred one thousand, twenty-one".