223421045 has 4 divisors (see below), whose sum is σ = 268105260. Its totient is φ = 178736832.

The previous prime is 223421039. The next prime is 223421063. The reversal of 223421045 is 540124322.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 540124322 = 2 ⋅270062161.

It can be written as a sum of positive squares in 2 ways, for example, as 138909796 + 84511249 = 11786^2 + 9193^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-223421045 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 223421045.

It is a congruent number.

It is an unprimeable number.

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, 22342100 + ... + 22342109.

It is an arithmetic number, because the mean of its divisors is an integer number (67026315).

Almost surely, 2^223421045 is an apocalyptic number.

It is an amenable number.

223421045 is a deficient number, since it is larger than the sum of its proper divisors (44684215).

223421045 is an equidigital number, since it uses as much as digits as its factorization.

223421045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44684214.

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 223421045 is about 14947.2755042516. The cubic root of 223421045 is about 606.7941142632.

Adding to 223421045 its reverse (540124322), we get a palindrome (763545367).

The spelling of 223421045 in words is "two hundred twenty-three million, four hundred twenty-one thousand, forty-five".