233022221 has 4 divisors (see below), whose sum is σ = 241057500. Its totient is φ = 224986944.

The previous prime is 233022199. The next prime is 233022239. The reversal of 233022221 is 122220332.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 78517321 + 154504900 = 8861^2 + 12430^2 .

It is a cyclic number.

It is not a de Polignac number, because 233022221 - 2¹⁰ = 233021197 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 233022221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (233022121) 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, 4017596 + ... + 4017653.

It is an arithmetic number, because the mean of its divisors is an integer number (60264375).

Almost surely, 2^233022221 is an apocalyptic number.

It is an amenable number.

233022221 is a deficient number, since it is larger than the sum of its proper divisors (8035279).

233022221 is an equidigital number, since it uses as much as digits as its factorization.

233022221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8035278.

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 233022221 is about 15265.0653781764. The cubic root of 233022221 is about 615.3645103756.

Adding to 233022221 its reverse (122220332), we get a palindrome (355242553).

The spelling of 233022221 in words is "two hundred thirty-three million, twenty-two thousand, two hundred twenty-one".