324144221 has 12 divisors (see below), whose sum is σ = 342397692. Its totient is φ = 306806016.

The previous prime is 324144217. The next prime is 324144251. The reversal of 324144221 is 122441423.

It can be written as a sum of positive squares in 2 ways, for example, as 160022500 + 164121721 = 12650^2 + 12811^2 .

It is not a de Polignac number, because 324144221 - 2² = 324144217 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (324144211) 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, 48155 + ... + 54471.

It is an arithmetic number, because the mean of its divisors is an integer number (28533141).

Almost surely, 2^324144221 is an apocalyptic number.

It is an amenable number.

324144221 is a deficient number, since it is larger than the sum of its proper divisors (18253471).

324144221 is an equidigital number, since it uses as much as digits as its factorization.

324144221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6460 (or 6437 counting only the distinct ones).

The product of its digits is 1536, while the sum is 23.

The square root of 324144221 is about 18004.0056931784. The cubic root of 324144221 is about 686.9304389538.

Adding to 324144221 its reverse (122441423), we get a palindrome (446585644).

The spelling of 324144221 in words is "three hundred twenty-four million, one hundred forty-four thousand, two hundred twenty-one".