224135321 has 2 divisors, whose sum is σ = 224135322. Its totient is φ = 224135320.

The previous prime is 224135279. The next prime is 224135323. The reversal of 224135321 is 123531422.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 153760000 + 70375321 = 12400^2 + 8389^2 .

It is a cyclic number.

It is not a de Polignac number, because 224135321 - 2⁶ = 224135257 is a prime.

It is a Sophie Germain prime.

Together with 224135323, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (224135323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112067660 + 112067661.

It is an arithmetic number, because the mean of its divisors is an integer number (112067661).

Almost surely, 2^224135321 is an apocalyptic number.

It is an amenable number.

224135321 is a deficient number, since it is larger than the sum of its proper divisors (1).

224135321 is an equidigital number, since it uses as much as digits as its factorization.

224135321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1440, while the sum is 23.

The square root of 224135321 is about 14971.1496218560. The cubic root of 224135321 is about 607.4400656662.

Adding to 224135321 its reverse (123531422), we get a palindrome (347666743).

The spelling of 224135321 in words is "two hundred twenty-four million, one hundred thirty-five thousand, three hundred twenty-one".