223523221 has 2 divisors, whose sum is σ = 223523222. Its totient is φ = 223523220.

The previous prime is 223523197. The next prime is 223523227. The reversal of 223523221 is 122325322.

223523221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 183060900 + 40462321 = 13530^2 + 6361^2 .

It is a cyclic number.

It is not a de Polignac number, because 223523221 - 2¹¹ = 223521173 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 223523192 and 223523201.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (223523227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111761610 + 111761611.

It is an arithmetic number, because the mean of its divisors is an integer number (111761611).

Almost surely, 2^223523221 is an apocalyptic number.

It is an amenable number.

223523221 is a deficient number, since it is larger than the sum of its proper divisors (1).

223523221 is an equidigital number, since it uses as much as digits as its factorization.

223523221 is an evil number, because the sum of its binary digits is even.

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

The square root of 223523221 is about 14950.6929939719. The cubic root of 223523221 is about 606.8866008453.

Adding to 223523221 its reverse (122325322), we get a palindrome (345848543).

The spelling of 223523221 in words is "two hundred twenty-three million, five hundred twenty-three thousand, two hundred twenty-one".