233321221 has 16 divisors (see below), whose sum is σ = 275799040. Its totient is φ = 193155840.

The previous prime is 233321171. The next prime is 233321227. The reversal of 233321221 is 122123332.

It is a cyclic number.

It is not a de Polignac number, because 233321221 - 2⁷ = 233321093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (233321227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 179245 + ... + 180541.

It is an arithmetic number, because the mean of its divisors is an integer number (17237440).

Almost surely, 2^233321221 is an apocalyptic number.

It is an amenable number.

233321221 is a deficient number, since it is larger than the sum of its proper divisors (42477819).

233321221 is a wasteful number, since it uses less digits than its factorization.

233321221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2164.

The product of its digits is 432, while the sum is 19.

The square root of 233321221 is about 15274.8558422003. The cubic root of 233321221 is about 615.6275973711.

Adding to 233321221 its reverse (122123332), we get a palindrome (355444553).

The spelling of 233321221 in words is "two hundred thirty-three million, three hundred twenty-one thousand, two hundred twenty-one".