243154531545 has 32 divisors (see below), whose sum is σ = 389655377280. Its totient is φ = 129479877120.

The previous prime is 243154531541. The next prime is 243154531547. The reversal of 243154531545 is 545135451342.

It is not a de Polignac number, because 243154531545 - 2² = 243154531541 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 243154531497 and 243154531506.

It is not an unprimeable number, because it can be changed into a prime (243154531541) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 32499205 + ... + 32506685.

It is an arithmetic number, because the mean of its divisors is an integer number (12176730540).

Almost surely, 2^243154531545 is an apocalyptic number.

It is an amenable number.

243154531545 is a deficient number, since it is larger than the sum of its proper divisors (146500845735).

243154531545 is a wasteful number, since it uses less digits than its factorization.

243154531545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10585.

The product of its digits is 720000, while the sum is 42.

Adding to 243154531545 its reverse (545135451342), we get a palindrome (788289982887).

It can be divided in two parts, 2431545 and 31545, that added together give a triangular number (2463090 = T₂₂₁₉).

The spelling of 243154531545 in words is "two hundred forty-three billion, one hundred fifty-four million, five hundred thirty-one thousand, five hundred forty-five".