231028033 has 2 divisors, whose sum is σ = 231028034. Its totient is φ = 231028032.

The previous prime is 231028019. The next prime is 231028043. The reversal of 231028033 is 330820132.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 146700544 + 84327489 = 12112^2 + 9183^2 .

It is a cyclic number.

It is not a de Polignac number, because 231028033 - 2⁵ = 231028001 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 231027995 and 231028013.

It is not a weakly prime, because it can be changed into another prime (231028003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115514016 + 115514017.

It is an arithmetic number, because the mean of its divisors is an integer number (115514017).

Almost surely, 2^231028033 is an apocalyptic number.

It is an amenable number.

231028033 is a deficient number, since it is larger than the sum of its proper divisors (1).

231028033 is an equidigital number, since it uses as much as digits as its factorization.

231028033 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 231028033 is about 15199.6063435867. The cubic root of 231028033 is about 613.6040632609.

Adding to 231028033 its reverse (330820132), we get a palindrome (561848165).

The spelling of 231028033 in words is "two hundred thirty-one million, twenty-eight thousand, thirty-three".