243115455245 has 16 divisors (see below), whose sum is σ = 314322129072. Its totient is φ = 179450181120.

The previous prime is 243115455241. The next prime is 243115455307. The reversal of 243115455245 is 542554511342.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 49503135049 + 193612320196 = 222493^2 + 440014^2 .

It is not a de Polignac number, because 243115455245 - 2² = 243115455241 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243115455241) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 701216 + ... + 988905.

It is an arithmetic number, because the mean of its divisors is an integer number (19645133067).

Almost surely, 2^243115455245 is an apocalyptic number.

It is an amenable number.

243115455245 is a deficient number, since it is larger than the sum of its proper divisors (71206673827).

243115455245 is a wasteful number, since it uses less digits than its factorization.

243115455245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1692352.

The product of its digits is 480000, while the sum is 41.

Adding to 243115455245 its reverse (542554511342), we get a palindrome (785669966587).

The spelling of 243115455245 in words is "two hundred forty-three billion, one hundred fifteen million, four hundred fifty-five thousand, two hundred forty-five".