223421565 has 24 divisors (see below), whose sum is σ = 379746720. Its totient is φ = 112146688.

The previous prime is 223421543. The next prime is 223421581. The reversal of 223421565 is 565124322.

223421565 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 223421565 - 2⁵ = 223421533 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21435 + ... + 30104.

It is an arithmetic number, because the mean of its divisors is an integer number (15822780).

Almost surely, 2^223421565 is an apocalyptic number.

It is an amenable number.

223421565 is a deficient number, since it is larger than the sum of its proper divisors (156325155).

223421565 is a wasteful number, since it uses less digits than its factorization.

223421565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51581 (or 51564 counting only the distinct ones).

The product of its digits is 14400, while the sum is 30.

The square root of 223421565 is about 14947.2928987158. The cubic root of 223421565 is about 606.7945850226.

Adding to 223421565 its reverse (565124322), we get a palindrome (788545887).

The spelling of 223421565 in words is "two hundred twenty-three million, four hundred twenty-one thousand, five hundred sixty-five".