233221643 has 2 divisors, whose sum is σ = 233221644. Its totient is φ = 233221642.

The previous prime is 233221609. The next prime is 233221673. The reversal of 233221643 is 346122332.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 233221643 - 2⁶ = 233221579 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (233221673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 116610821 + 116610822.

It is an arithmetic number, because the mean of its divisors is an integer number (116610822).

Almost surely, 2^233221643 is an apocalyptic number.

233221643 is a deficient number, since it is larger than the sum of its proper divisors (1).

233221643 is an equidigital number, since it uses as much as digits as its factorization.

233221643 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5184, while the sum is 26.

The square root of 233221643 is about 15271.5959545818. The cubic root of 233221643 is about 615.5400046984.

Adding to 233221643 its reverse (346122332), we get a palindrome (579343975).

The spelling of 233221643 in words is "two hundred thirty-three million, two hundred twenty-one thousand, six hundred forty-three".