243043131541 has 12 divisors (see below), whose sum is σ = 284188543212. Its totient is φ = 207243283968.

The previous prime is 243043131523. The next prime is 243043131547. The reversal of 243043131541 is 145131340342.

It can be written as a sum of positive squares in 2 ways, for example, as 29405047441 + 213638084100 = 171479^2 + 462210^2 .

It is not a de Polignac number, because 243043131541 - 2⁹ = 243043131029 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243043131547) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12840450 + ... + 12859363.

It is an arithmetic number, because the mean of its divisors is an integer number (23682378601).

Almost surely, 2^243043131541 is an apocalyptic number.

It is an amenable number.

243043131541 is a deficient number, since it is larger than the sum of its proper divisors (41145411671).

243043131541 is a wasteful number, since it uses less digits than its factorization.

243043131541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25700020 (or 25700013 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 31.

Adding to 243043131541 its reverse (145131340342), we get a palindrome (388174471883).

The spelling of 243043131541 in words is "two hundred forty-three billion, forty-three million, one hundred thirty-one thousand, five hundred forty-one".