243493517099 has 12 divisors (see below), whose sum is σ = 283307003784. Its totient is φ = 208664928864.

The previous prime is 243493517009. The next prime is 243493517159. The reversal of 243493517099 is 990715394342.

243493517099 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 243493517099 - 2¹⁶ = 243493451563 is a prime.

It is not an unprimeable number, because it can be changed into a prime (243493517009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 284474 + ... + 753599.

It is an arithmetic number, because the mean of its divisors is an integer number (23608916982).

Almost surely, 2^243493517099 is an apocalyptic number.

243493517099 is a deficient number, since it is larger than the sum of its proper divisors (39813486685).

243493517099 is a wasteful number, since it uses less digits than its factorization.

243493517099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1042874 (or 1042867 counting only the distinct ones).

The product of its (nonzero) digits is 7348320, while the sum is 56.

The spelling of 243493517099 in words is "two hundred forty-three billion, four hundred ninety-three million, five hundred seventeen thousand, ninety-nine".