243538701005 has 4 divisors (see below), whose sum is σ = 292246441212. Its totient is φ = 194830960800.

The previous prime is 243538701001. The next prime is 243538701013. The reversal of 243538701005 is 500107835342.

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

It can be written as a sum of positive squares in 2 ways, for example, as 48293139049 + 195245561956 = 219757^2 + 441866^2 .

It is not a de Polignac number, because 243538701005 - 2² = 243538701001 is a prime.

It is a super-3 number, since 3×243538701005³ (a number of 35 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 243538701005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243538701001) 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, 24353870096 + ... + 24353870105.

It is an arithmetic number, because the mean of its divisors is an integer number (73061610303).

Almost surely, 2^243538701005 is an apocalyptic number.

It is an amenable number.

243538701005 is a deficient number, since it is larger than the sum of its proper divisors (48707740207).

243538701005 is an equidigital number, since it uses as much as digits as its factorization.

243538701005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48707740206.

The product of its (nonzero) digits is 100800, while the sum is 38.

The spelling of 243538701005 in words is "two hundred forty-three billion, five hundred thirty-eight million, seven hundred one thousand, five".