243155041297 has 4 divisors (see below), whose sum is σ = 277891475776. Its totient is φ = 208418606820.

The previous prime is 243155041289. The next prime is 243155041361. The reversal of 243155041297 is 792140551342.

243155041297 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 243155041297 - 2³ = 243155041289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243155041277) 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 3 ways as a sum of consecutive naturals, for example, 17368217229 + ... + 17368217242.

It is an arithmetic number, because the mean of its divisors is an integer number (69472868944).

Almost surely, 2^243155041297 is an apocalyptic number.

It is an amenable number.

243155041297 is a deficient number, since it is larger than the sum of its proper divisors (34736434479).

243155041297 is an equidigital number, since it uses as much as digits as its factorization.

243155041297 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34736434478.

The product of its (nonzero) digits is 302400, while the sum is 43.

The spelling of 243155041297 in words is "two hundred forty-three billion, one hundred fifty-five million, forty-one thousand, two hundred ninety-seven".