224312321 has 2 divisors, whose sum is σ = 224312322. Its totient is φ = 224312320.

The previous prime is 224312317. The next prime is 224312327. The reversal of 224312321 is 123213422.

224312321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 198951025 + 25361296 = 14105^2 + 5036^2 .

It is a cyclic number.

It is not a de Polignac number, because 224312321 - 2² = 224312317 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 224312293 and 224312302.

It is not a weakly prime, because it can be changed into another prime (224312327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112156160 + 112156161.

It is an arithmetic number, because the mean of its divisors is an integer number (112156161).

Almost surely, 2^224312321 is an apocalyptic number.

It is an amenable number.

224312321 is a deficient number, since it is larger than the sum of its proper divisors (1).

224312321 is an equidigital number, since it uses as much as digits as its factorization.

224312321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 576, while the sum is 20.

The square root of 224312321 is about 14977.0598249456. The cubic root of 224312321 is about 607.5999223716.

Adding to 224312321 its reverse (123213422), we get a palindrome (347525743).

The spelling of 224312321 in words is "two hundred twenty-four million, three hundred twelve thousand, three hundred twenty-one".