223540321 has 8 divisors (see below), whose sum is σ = 229888800. Its totient is φ = 217277280.

The previous prime is 223540309. The next prime is 223540337. The reversal of 223540321 is 123045322.

223540321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 223540321 - 2⁹ = 223539809 is a prime.

It is a super-2 number, since 2×223540321² = 99940550225566082, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 223540292 and 223540301.

It is not an unprimeable number, because it can be changed into a prime (223540351) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16035 + ... + 26536.

It is an arithmetic number, because the mean of its divisors is an integer number (28736100).

Almost surely, 2^223540321 is an apocalyptic number.

It is an amenable number.

223540321 is a deficient number, since it is larger than the sum of its proper divisors (6348479).

223540321 is an equidigital number, since it uses as much as digits as its factorization.

223540321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42719.

The product of its (nonzero) digits is 1440, while the sum is 22.

The square root of 223540321 is about 14951.2648628803. The cubic root of 223540321 is about 606.9020764876.

Adding to 223540321 its reverse (123045322), we get a palindrome (346585643).

The spelling of 223540321 in words is "two hundred twenty-three million, five hundred forty thousand, three hundred twenty-one".