223221445 has 8 divisors (see below), whose sum is σ = 271093536. Its totient is φ = 176425296.

The previous prime is 223221437. The next prime is 223221451. The reversal of 223221445 is 544122322.

223221445 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 223221445 - 2³ = 223221437 is a prime.

It is a super-3 number, since 3×223221445³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 268527 + ... + 269356.

It is an arithmetic number, because the mean of its divisors is an integer number (33886692).

Almost surely, 2^223221445 is an apocalyptic number.

It is an amenable number.

223221445 is a deficient number, since it is larger than the sum of its proper divisors (47872091).

223221445 is an equidigital number, since it uses as much as digits as its factorization.

223221445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 537971.

The product of its digits is 3840, while the sum is 25.

The square root of 223221445 is about 14940.5972102858. The cubic root of 223221445 is about 606.6133610867.

Adding to 223221445 its reverse (544122322), we get a palindrome (767343767).

The spelling of 223221445 in words is "two hundred twenty-three million, two hundred twenty-one thousand, four hundred forty-five".