243261238107 has 4 divisors (see below), whose sum is σ = 324348317480. Its totient is φ = 162174158736.

The previous prime is 243261238061. The next prime is 243261238111. The reversal of 243261238107 is 701832162342.

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

It is not a de Polignac number, because 243261238107 - 2⁶ = 243261238043 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243261238117) 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, 40543539682 + ... + 40543539687.

It is an arithmetic number, because the mean of its divisors is an integer number (81087079370).

Almost surely, 2^243261238107 is an apocalyptic number.

243261238107 is a deficient number, since it is larger than the sum of its proper divisors (81087079373).

243261238107 is an equidigital number, since it uses as much as digits as its factorization.

243261238107 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81087079372.

The product of its (nonzero) digits is 96768, while the sum is 39.

The spelling of 243261238107 in words is "two hundred forty-three billion, two hundred sixty-one million, two hundred thirty-eight thousand, one hundred seven".