243420855 has 8 divisors (see below), whose sum is σ = 389473392. Its totient is φ = 129824448.

The previous prime is 243420851. The next prime is 243420887. The reversal of 243420855 is 558024342.

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

It is not a de Polignac number, because 243420855 - 2² = 243420851 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243420851) 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, 8114014 + ... + 8114043.

It is an arithmetic number, because the mean of its divisors is an integer number (48684174).

Almost surely, 2^243420855 is an apocalyptic number.

243420855 is a deficient number, since it is larger than the sum of its proper divisors (146052537).

243420855 is a wasteful number, since it uses less digits than its factorization.

243420855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16228065.

The product of its (nonzero) digits is 38400, while the sum is 33.

The square root of 243420855 is about 15601.9503588494. The cubic root of 243420855 is about 624.3851916821.

The spelling of 243420855 in words is "two hundred forty-three million, four hundred twenty thousand, eight hundred fifty-five".