243125013943 has 4 divisors (see below), whose sum is σ = 277857158800. Its totient is φ = 208392869088.

The previous prime is 243125013907. The next prime is 243125013977. The reversal of 243125013943 is 349310521342.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-243125013943 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243125013343) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17366072418 + ... + 17366072431.

It is an arithmetic number, because the mean of its divisors is an integer number (69464289700).

Almost surely, 2^243125013943 is an apocalyptic number.

243125013943 is a deficient number, since it is larger than the sum of its proper divisors (34732144857).

243125013943 is an equidigital number, since it uses as much as digits as its factorization.

243125013943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34732144856.

The product of its (nonzero) digits is 77760, while the sum is 37.

The spelling of 243125013943 in words is "two hundred forty-three billion, one hundred twenty-five million, thirteen thousand, nine hundred forty-three".