223421043 has 4 divisors (see below), whose sum is σ = 297894728. Its totient is φ = 148947360.

The previous prime is 223421039. The next prime is 223421063. The reversal of 223421043 is 340124322.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 223421043 - 2² = 223421039 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (223421063) 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 3 ways as a sum of consecutive naturals, for example, 37236838 + ... + 37236843.

It is an arithmetic number, because the mean of its divisors is an integer number (74473682).

Almost surely, 2^223421043 is an apocalyptic number.

223421043 is a deficient number, since it is larger than the sum of its proper divisors (74473685).

223421043 is an equidigital number, since it uses as much as digits as its factorization.

223421043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74473684.

The product of its (nonzero) digits is 1152, while the sum is 21.

The square root of 223421043 is about 14947.2754373498. The cubic root of 223421043 is about 606.7941124526.

Adding to 223421043 its reverse (340124322), we get a palindrome (563545365).

The spelling of 223421043 in words is "two hundred twenty-three million, four hundred twenty-one thousand, forty-three".