243431424545 has 8 divisors (see below), whose sum is σ = 292900869096. Its totient is φ = 194223033216.

The previous prime is 243431424529. The next prime is 243431424557. The reversal of 243431424545 is 545424134342.

It can be written as a sum of positive squares in 4 ways, for example, as 6776417761 + 236655006784 = 82319^2 + 486472^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 243431424545 - 2⁴ = 243431424529 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65261252 + ... + 65264981.

It is an arithmetic number, because the mean of its divisors is an integer number (36612608637).

Almost surely, 2^243431424545 is an apocalyptic number.

It is an amenable number.

243431424545 is a deficient number, since it is larger than the sum of its proper divisors (49469444551).

243431424545 is a wasteful number, since it uses less digits than its factorization.

243431424545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130526611.

The product of its digits is 921600, while the sum is 41.

Adding to 243431424545 its reverse (545424134342), we get a palindrome (788855558887).

The spelling of 243431424545 in words is "two hundred forty-three billion, four hundred thirty-one million, four hundred twenty-four thousand, five hundred forty-five".