243311331545 has 8 divisors (see below), whose sum is σ = 307340629440. Its totient is φ = 184404377520.

The previous prime is 243311331541. The next prime is 243311331589. The reversal of 243311331545 is 545133113342.

243311331545 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 243311331545 - 2² = 243311331541 is a prime.

It is not an unprimeable number, because it can be changed into a prime (243311331541) 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 7 ways as a sum of consecutive naturals, for example, 1280585861 + ... + 1280586050.

It is an arithmetic number, because the mean of its divisors is an integer number (38417578680).

Almost surely, 2^243311331545 is an apocalyptic number.

It is an amenable number.

243311331545 is a deficient number, since it is larger than the sum of its proper divisors (64029297895).

243311331545 is a wasteful number, since it uses less digits than its factorization.

243311331545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2561171935.

The product of its digits is 64800, while the sum is 35.

Adding to 243311331545 its reverse (545133113342), we get a palindrome (788444444887).

The spelling of 243311331545 in words is "two hundred forty-three billion, three hundred eleven million, three hundred thirty-one thousand, five hundred forty-five".