243115305545 has 16 divisors (see below), whose sum is σ = 341169121920. Its totient is φ = 162830715264.

The previous prime is 243115305493. The next prime is 243115305569. The reversal of 243115305545 is 545503511342.

It is not a de Polignac number, because 243115305545 - 2¹⁴ = 243115289161 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 243115305499 and 243115305508.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 80767700 + ... + 80770709.

It is an arithmetic number, because the mean of its divisors is an integer number (21323070120).

Almost surely, 2^243115305545 is an apocalyptic number.

It is an amenable number.

243115305545 is a deficient number, since it is larger than the sum of its proper divisors (98053816375).

243115305545 is a wasteful number, since it uses less digits than its factorization.

243115305545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161538464.

The product of its (nonzero) digits is 180000, while the sum is 38.

Adding to 243115305545 its reverse (545503511342), we get a palindrome (788618816887).

The spelling of 243115305545 in words is "two hundred forty-three billion, one hundred fifteen million, three hundred five thousand, five hundred forty-five".