233444221 has 8 divisors (see below), whose sum is σ = 247455864. Its totient is φ = 219463680.

The previous prime is 233444213. The next prime is 233444261. The reversal of 233444221 is 122444332.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 28238596 + 205205625 = 5314^2 + 14325^2 .

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 233444221 - 2³ = 233444213 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 (233444261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8701 + ... + 23293.

It is an arithmetic number, because the mean of its divisors is an integer number (30931983).

Almost surely, 2^233444221 is an apocalyptic number.

It is an amenable number.

233444221 is a deficient number, since it is larger than the sum of its proper divisors (14011643).

233444221 is a wasteful number, since it uses less digits than its factorization.

233444221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15551.

The product of its digits is 4608, while the sum is 25.

The square root of 233444221 is about 15278.8815362905. The cubic root of 233444221 is about 615.7357585460.

Adding to 233444221 its reverse (122444332), we get a palindrome (355888553).

The spelling of 233444221 in words is "two hundred thirty-three million, four hundred forty-four thousand, two hundred twenty-one".