23003221 has 2 divisors, whose sum is σ = 23003222. Its totient is φ = 23003220.

The previous prime is 23003191. The next prime is 23003263. The reversal of 23003221 is 12230032.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21762225 + 1240996 = 4665^2 + 1114^2 .

It is a cyclic number.

It is not a de Polignac number, because 23003221 - 2⁹ = 23002709 is a prime.

It is a zygodrome in base 4.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23003021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11501610 + 11501611.

It is an arithmetic number, because the mean of its divisors is an integer number (11501611).

Almost surely, 2^23003221 is an apocalyptic number.

It is an amenable number.

23003221 is a deficient number, since it is larger than the sum of its proper divisors (1).

23003221 is an equidigital number, since it uses as much as digits as its factorization.

23003221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 13.

The square root of 23003221 is about 4796.1673240203. The cubic root of 23003221 is about 284.3999728663.

Adding to 23003221 its reverse (12230032), we get a palindrome (35233253).

The spelling of 23003221 in words is "twenty-three million, three thousand, two hundred twenty-one".