243312445133 has 4 divisors (see below), whose sum is σ = 243317493948. Its totient is φ = 243307396320.

The previous prime is 243312445111. The next prime is 243312445163. The reversal of 243312445133 is 331544213342.

243312445133 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 26326036009 + 216986409124 = 162253^2 + 465818^2 .

It is a cyclic number.

It is not a de Polignac number, because 243312445133 - 2¹² = 243312441037 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 243312445093 and 243312445102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243312445163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2451416 + ... + 2548737.

It is an arithmetic number, because the mean of its divisors is an integer number (60829373487).

Almost surely, 2^243312445133 is an apocalyptic number.

It is an amenable number.

243312445133 is a deficient number, since it is larger than the sum of its proper divisors (5048815).

243312445133 is an equidigital number, since it uses as much as digits as its factorization.

243312445133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5048814.

The product of its digits is 103680, while the sum is 35.

Adding to 243312445133 its reverse (331544213342), we get a palindrome (574856658475).

The spelling of 243312445133 in words is "two hundred forty-three billion, three hundred twelve million, four hundred forty-five thousand, one hundred thirty-three".