243323975 has 24 divisors (see below), whose sum is σ = 336295440. Its totient is φ = 173560320.

The previous prime is 243323909. The next prime is 243323989. The reversal of 243323975 is 579323342.

It is not a de Polignac number, because 243323975 - 2⁸ = 243323719 is a prime.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6992 + ... + 23141.

It is an arithmetic number, because the mean of its divisors is an integer number (14012310).

Almost surely, 2^243323975 is an apocalyptic number.

243323975 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

243323975 is a deficient number, since it is larger than the sum of its proper divisors (92971465).

243323975 is a wasteful number, since it uses less digits than its factorization.

243323975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30179 (or 30174 counting only the distinct ones).

The product of its digits is 136080, while the sum is 38.

The square root of 243323975 is about 15598.8453098298. The cubic root of 243323975 is about 624.3023468713.

The spelling of 243323975 in words is "two hundred forty-three million, three hundred twenty-three thousand, nine hundred seventy-five".