243440234225 has 6 divisors (see below), whose sum is σ = 301865890470. Its totient is φ = 194752187360.

The previous prime is 243440234159. The next prime is 243440234227. The reversal of 243440234225 is 522432044342.

It can be written as a sum of positive squares in 3 ways, for example, as 4664343616 + 238775890609 = 68296^2 + 488647^2 .

It is not a de Polignac number, because 243440234225 - 2¹⁸ = 243439972081 is a prime.

It is a super-2 number, since 2×243440234225² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (243440234227) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4868804660 + ... + 4868804709.

It is an arithmetic number, because the mean of its divisors is an integer number (50310981745).

Almost surely, 2^243440234225 is an apocalyptic number.

243440234225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

243440234225 is a deficient number, since it is larger than the sum of its proper divisors (58425656245).

243440234225 is an equidigital number, since it uses as much as digits as its factorization.

243440234225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9737609379 (or 9737609374 counting only the distinct ones).

The product of its (nonzero) digits is 184320, while the sum is 35.

Adding to 243440234225 its reverse (522432044342), we get a palindrome (765872278567).

The spelling of 243440234225 in words is "two hundred forty-three billion, four hundred forty million, two hundred thirty-four thousand, two hundred twenty-five".