233033221 has 2 divisors, whose sum is σ = 233033222. Its totient is φ = 233033220.

The previous prime is 233033219. The next prime is 233033243. The reversal of 233033221 is 122330332.

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., 233020225 + 12996 = 15265^2 + 114^2 .

It is a cyclic number.

It is not a de Polignac number, because 233033221 - 2¹ = 233033219 is a prime.

Together with 233033219, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (233033261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 116516610 + 116516611.

It is an arithmetic number, because the mean of its divisors is an integer number (116516611).

Almost surely, 2^233033221 is an apocalyptic number.

It is an amenable number.

233033221 is a deficient number, since it is larger than the sum of its proper divisors (1).

233033221 is an equidigital number, since it uses as much as digits as its factorization.

233033221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 19.

The square root of 233033221 is about 15265.4256737243. The cubic root of 233033221 is about 615.3741931476.

Adding to 233033221 its reverse (122330332), we get a palindrome (355363553).

The spelling of 233033221 in words is "two hundred thirty-three million, thirty-three thousand, two hundred twenty-one".