243040342 has 4 divisors (see below), whose sum is σ = 364560516. Its totient is φ = 121520170.

The previous prime is 243040331. The next prime is 243040361.

243040342 is nontrivially palindromic in base 10.

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

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60760084 + ... + 60760087.

It is an arithmetic number, because the mean of its divisors is an integer number (91140129).

Almost surely, 2^243040342 is an apocalyptic number.

243040342 is a deficient number, since it is larger than the sum of its proper divisors (121520174).

243040342 is a wasteful number, since it uses less digits than its factorization.

243040342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121520173.

The product of its (nonzero) digits is 2304, while the sum is 22.

The square root of 243040342 is about 15589.7511846726. The cubic root of 243040342 is about 624.0596778202.

The spelling of 243040342 in words is "two hundred forty-three million, forty thousand, three hundred forty-two".