243431220045 has 32 divisors (see below), whose sum is σ = 419626368000. Its totient is φ = 119792876544.

The previous prime is 243431219953. The next prime is 243431220049. The reversal of 243431220045 is 540022134342.

243431220045 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 243431220045 - 2¹⁴ = 243431203661 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 243431219994 and 243431220021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243431220049) 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 31 ways as a sum of consecutive naturals, for example, 207621 + ... + 727989.

It is an arithmetic number, because the mean of its divisors is an integer number (13113324000).

Almost surely, 2^243431220045 is an apocalyptic number.

It is an amenable number.

243431220045 is a deficient number, since it is larger than the sum of its proper divisors (176195147955).

243431220045 is a wasteful number, since it uses less digits than its factorization.

243431220045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 522789.

The product of its (nonzero) digits is 23040, while the sum is 30.

Adding to 243431220045 its reverse (540022134342), we get a palindrome (783453354387).

The spelling of 243431220045 in words is "two hundred forty-three billion, four hundred thirty-one million, two hundred twenty thousand, forty-five".