243967217144 has 32 divisors (see below), whose sum is σ = 525808804320. Its totient is φ = 103952996736.

The previous prime is 243967217071. The next prime is 243967217147. The reversal of 243967217144 is 441712769342.

It is a Smith number, since the sum of its digits (50) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 243967217092 and 243967217101.

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 7 ways as a sum of consecutive naturals, for example, 12581519 + ... + 12600894.

It is an arithmetic number, because the mean of its divisors is an integer number (16431525135).

Almost surely, 2^243967217144 is an apocalyptic number.

It is an amenable number.

243967217144 is an abundant number, since it is smaller than the sum of its proper divisors (281841587176).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

243967217144 is a wasteful number, since it uses less digits than its factorization.

243967217144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25182599 (or 25182595 counting only the distinct ones).

The product of its digits is 2032128, while the sum is 50.

The spelling of 243967217144 in words is "two hundred forty-three billion, nine hundred sixty-seven million, two hundred seventeen thousand, one hundred forty-four".