243325133 has 4 divisors (see below), whose sum is σ = 246658428. Its totient is φ = 239991840.

The previous prime is 243325129. The next prime is 243325151. The reversal of 243325133 is 331523342.

It is a happy number.

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 189420169 + 53904964 = 13763^2 + 7342^2 .

It is a cyclic number.

It is not a de Polignac number, because 243325133 - 2² = 243325129 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243325123) 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 in 3 ways as a sum of consecutive naturals, for example, 1666538 + ... + 1666683.

It is an arithmetic number, because the mean of its divisors is an integer number (61664607).

Almost surely, 2^243325133 is an apocalyptic number.

It is an amenable number.

243325133 is a deficient number, since it is larger than the sum of its proper divisors (3333295).

243325133 is an equidigital number, since it uses as much as digits as its factorization.

243325133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3333294.

The product of its digits is 6480, while the sum is 26.

The square root of 243325133 is about 15598.8824279177. The cubic root of 243325133 is about 624.3033372395.

Adding to 243325133 its reverse (331523342), we get a palindrome (574848475).

The spelling of 243325133 in words is "two hundred forty-three million, three hundred twenty-five thousand, one hundred thirty-three".