243113231999 has 8 divisors (see below), whose sum is σ = 271382212992. Its totient is φ = 215872214040.

The previous prime is 243113231981. The next prime is 243113232007. The reversal of 243113231999 is 999132311342.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 243113231999 - 2⁸ = 243113231743 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243113231939) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 256990259 + ... + 256991204.

It is an arithmetic number, because the mean of its divisors is an integer number (33922776624).

Almost surely, 2^243113231999 is an apocalyptic number.

243113231999 is a deficient number, since it is larger than the sum of its proper divisors (28268980993).

243113231999 is a wasteful number, since it uses less digits than its factorization.

243113231999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 513981517.

The product of its digits is 314928, while the sum is 47.

The spelling of 243113231999 in words is "two hundred forty-three billion, one hundred thirteen million, two hundred thirty-one thousand, nine hundred ninety-nine".