243440134441 has 24 divisors (see below), whose sum is σ = 291294241416. Its totient is φ = 202705735680.

The previous prime is 243440134403. The next prime is 243440134451. The reversal of 243440134441 is 144431044342.

It can be written as a sum of positive squares in 4 ways, for example, as 150280275600 + 93159858841 = 387660^2 + 305221^2 .

It is not a de Polignac number, because 243440134441 - 2³³ = 234850199849 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 243440134397 and 243440134406.

It is not an unprimeable number, because it can be changed into a prime (243440134451) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1057395 + ... + 1266871.

It is an arithmetic number, because the mean of its divisors is an integer number (12137260059).

Almost surely, 2^243440134441 is an apocalyptic number.

It is an amenable number.

243440134441 is a deficient number, since it is larger than the sum of its proper divisors (47854106975).

243440134441 is a wasteful number, since it uses less digits than its factorization.

243440134441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210169 (or 210162 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 34.

Adding to 243440134441 its reverse (144431044342), we get a palindrome (387871178783).

Subtracting from 243440134441 its reverse (144431044342), we obtain a palindrome (99009090099).

The spelling of 243440134441 in words is "two hundred forty-three billion, four hundred forty million, one hundred thirty-four thousand, four hundred forty-one".