243206343299 has 4 divisors (see below), whose sum is σ = 251592768960. Its totient is φ = 234819917640.

The previous prime is 243206343269. The next prime is 243206343307. The reversal of 243206343299 is 992343602342.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 243206343299 - 2⁸ = 243206343043 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243206343269) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4193212787 + ... + 4193212844.

It is an arithmetic number, because the mean of its divisors is an integer number (62898192240).

Almost surely, 2^243206343299 is an apocalyptic number.

243206343299 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

243206343299 is a deficient number, since it is larger than the sum of its proper divisors (8386425661).

243206343299 is an equidigital number, since it uses as much as digits as its factorization.

243206343299 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8386425660.

The product of its (nonzero) digits is 1679616, while the sum is 47.

The spelling of 243206343299 in words is "two hundred forty-three billion, two hundred six million, three hundred forty-three thousand, two hundred ninety-nine".