243120032309 has 16 divisors (see below), whose sum is σ = 304804062720. Its totient is φ = 188385822960.

The previous prime is 243120032303. The next prime is 243120032317. The reversal of 243120032309 is 903230021342.

It is a cyclic number.

It is not a de Polignac number, because 243120032309 - 2⁴ = 243120032293 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 (243120032303) 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, 8805779 + ... + 8833344.

It is an arithmetic number, because the mean of its divisors is an integer number (19050253920).

Almost surely, 2^243120032309 is an apocalyptic number.

It is an amenable number.

243120032309 is a deficient number, since it is larger than the sum of its proper divisors (61684030411).

243120032309 is a wasteful number, since it uses less digits than its factorization.

243120032309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17639320.

The product of its (nonzero) digits is 7776, while the sum is 29.

The spelling of 243120032309 in words is "two hundred forty-three billion, one hundred twenty million, thirty-two thousand, three hundred nine".