233224021 has 2 divisors, whose sum is σ = 233224022. Its totient is φ = 233224020.

The previous prime is 233224007. The next prime is 233224063. The reversal of 233224021 is 120422332.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 144600625 + 88623396 = 12025^2 + 9414^2 .

It is a cyclic number.

It is not a de Polignac number, because 233224021 - 2¹⁵ = 233191253 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 233224021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (233224081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 116612010 + 116612011.

It is an arithmetic number, because the mean of its divisors is an integer number (116612011).

Almost surely, 2^233224021 is an apocalyptic number.

It is an amenable number.

233224021 is a deficient number, since it is larger than the sum of its proper divisors (1).

233224021 is an equidigital number, since it uses as much as digits as its factorization.

233224021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 233224021 is about 15271.6738113410. The cubic root of 233224021 is about 615.5420967701.

Adding to 233224021 its reverse (120422332), we get a palindrome (353646353).

The spelling of 233224021 in words is "two hundred thirty-three million, two hundred twenty-four thousand, twenty-one".