223441921 has 2 divisors, whose sum is σ = 223441922. Its totient is φ = 223441920.

The previous prime is 223441913. The next prime is 223441937. The reversal of 223441921 is 129144322.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 209670400 + 13771521 = 14480^2 + 3711^2 .

It is a cyclic number.

It is not a de Polignac number, because 223441921 - 2³ = 223441913 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 223441921.

It is not a weakly prime, because it can be changed into another prime (223441951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111720960 + 111720961.

It is an arithmetic number, because the mean of its divisors is an integer number (111720961).

Almost surely, 2^223441921 is an apocalyptic number.

It is an amenable number.

223441921 is a deficient number, since it is larger than the sum of its proper divisors (1).

223441921 is an equidigital number, since it uses as much as digits as its factorization.

223441921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3456, while the sum is 28.

The square root of 223441921 is about 14947.9738091823. The cubic root of 223441921 is about 606.8130128699.

The spelling of 223441921 in words is "two hundred twenty-three million, four hundred forty-one thousand, nine hundred twenty-one".