243967217143 has 16 divisors (see below), whose sum is σ = 267077260800. Its totient is φ = 221504152320.

The previous prime is 243967217071. The next prime is 243967217147. The reversal of 243967217143 is 341712769342.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-243967217143 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 (243967217147) 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, 331008 + ... + 772981.

It is an arithmetic number, because the mean of its divisors is an integer number (16692328800).

Almost surely, 2^243967217143 is an apocalyptic number.

243967217143 is a deficient number, since it is larger than the sum of its proper divisors (23110043657).

243967217143 is a wasteful number, since it uses less digits than its factorization.

243967217143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1104282.

The product of its digits is 1524096, while the sum is 49.

The spelling of 243967217143 in words is "two hundred forty-three billion, nine hundred sixty-seven million, two hundred seventeen thousand, one hundred forty-three".