233333221 has 4 divisors (see below), whose sum is σ = 254545344. Its totient is φ = 212121100.

The previous prime is 233333171. The next prime is 233333237. The reversal of 233333221 is 122333332.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 233333221 - 2⁹ = 233332709 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 233333192 and 233333201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (233333251) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10606045 + ... + 10606066.

It is an arithmetic number, because the mean of its divisors is an integer number (63636336).

Almost surely, 2^233333221 is an apocalyptic number.

It is an amenable number.

233333221 is a deficient number, since it is larger than the sum of its proper divisors (21212123).

233333221 is a wasteful number, since it uses less digits than its factorization.

233333221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21212122.

The product of its digits is 1944, while the sum is 22.

The square root of 233333221 is about 15275.2486395476. The cubic root of 233333221 is about 615.6381513540.

Adding to 233333221 its reverse (122333332), we get a palindrome (355666553).

The spelling of 233333221 in words is "two hundred thirty-three million, three hundred thirty-three thousand, two hundred twenty-one".