243448381 has 8 divisors (see below), whose sum is σ = 281202624. Its totient is φ = 208297920.

The previous prime is 243448343. The next prime is 243448393. The reversal of 243448381 is 183844342.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-243448381 is a prime.

It is a super-2 number, since 2×243448381² = 118534228423042322, which contains 22 as substring.

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 243448381.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243448081) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 650745 + ... + 651118.

It is an arithmetic number, because the mean of its divisors is an integer number (35150328).

Almost surely, 2^243448381 is an apocalyptic number.

It is an amenable number.

243448381 is a deficient number, since it is larger than the sum of its proper divisors (37754243).

243448381 is a wasteful number, since it uses less digits than its factorization.

243448381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1301891.

The product of its digits is 73728, while the sum is 37.

The square root of 243448381 is about 15602.8324672157. The cubic root of 243448381 is about 624.4087259284.

The spelling of 243448381 in words is "two hundred forty-three million, four hundred forty-eight thousand, three hundred eighty-one".