233221189 has 2 divisors, whose sum is σ = 233221190. Its totient is φ = 233221188.

The previous prime is 233221133. The next prime is 233221237. The reversal of 233221189 is 981122332.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 231557089 + 1664100 = 15217^2 + 1290^2 .

It is a cyclic number.

It is not a de Polignac number, because 233221189 - 2²³ = 224832581 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 233221189.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (233225189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 116610594 + 116610595.

It is an arithmetic number, because the mean of its divisors is an integer number (116610595).

Almost surely, 2^233221189 is an apocalyptic number.

It is an amenable number.

233221189 is a deficient number, since it is larger than the sum of its proper divisors (1).

233221189 is an equidigital number, since it uses as much as digits as its factorization.

233221189 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5184, while the sum is 31.

The square root of 233221189 is about 15271.5810903783. The cubic root of 233221189 is about 615.5396052853.

The spelling of 233221189 in words is "two hundred thirty-three million, two hundred twenty-one thousand, one hundred eighty-nine".