243181338 has 8 divisors (see below), whose sum is σ = 486362688. Its totient is φ = 81060444.

The previous prime is 243181321. The next prime is 243181339. The reversal of 243181338 is 833181342.

It is a sphenic number, since it is the product of 3 distinct primes.

243181338 is an admirable number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 243181299 and 243181308.

It is not an unprimeable number, because it can be changed into a prime (243181339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20265106 + ... + 20265117.

It is an arithmetic number, because the mean of its divisors is an integer number (60795336).

Almost surely, 2^243181338 is an apocalyptic number.

243181338 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

243181338 is a wasteful number, since it uses less digits than its factorization.

243181338 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40530228.

The product of its digits is 13824, while the sum is 33.

The square root of 243181338 is about 15594.2726024653. The cubic root of 243181338 is about 624.1803339327.

The spelling of 243181338 in words is "two hundred forty-three million, one hundred eighty-one thousand, three hundred thirty-eight".