223438321 has 2 divisors, whose sum is σ = 223438322. Its totient is φ = 223438320.

The previous prime is 223438291. The next prime is 223438343. The reversal of 223438321 is 123834322.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 113188321 + 110250000 = 10639^2 + 10500^2 .

It is a cyclic number.

It is not a de Polignac number, because 223438321 - 2¹¹ = 223436273 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 223438321.

It is not a weakly prime, because it can be changed into another prime (223438351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111719160 + 111719161.

It is an arithmetic number, because the mean of its divisors is an integer number (111719161).

Almost surely, 2^223438321 is an apocalyptic number.

It is an amenable number.

223438321 is a deficient number, since it is larger than the sum of its proper divisors (1).

223438321 is an equidigital number, since it uses as much as digits as its factorization.

223438321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6912, while the sum is 28.

The square root of 223438321 is about 14947.8533910391. The cubic root of 223438321 is about 606.8097539491.

It can be divided in two parts, 22 and 3438321, that added together give a palindrome (3438343).

The spelling of 223438321 in words is "two hundred twenty-three million, four hundred thirty-eight thousand, three hundred twenty-one".