243343340242 has 4 divisors (see below), whose sum is σ = 365015010366. Its totient is φ = 121671670120.

The previous prime is 243343340197. The next prime is 243343340263. The reversal of 243343340242 is 242043343342.

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

It can be written as a sum of positive squares in only one way, i.e., 154526823801 + 88816516441 = 393099^2 + 298021^2 .

It is a junction number, because it is equal to n+sod(n) for n = 243343340198 and 243343340207.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 60835835059 + ... + 60835835062.

Almost surely, 2^243343340242 is an apocalyptic number.

243343340242 is a deficient number, since it is larger than the sum of its proper divisors (121671670124).

243343340242 is a wasteful number, since it uses less digits than its factorization.

243343340242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121671670123.

The product of its (nonzero) digits is 165888, while the sum is 34.

Adding to 243343340242 its reverse (242043343342), we get a palindrome (485386683584).

The spelling of 243343340242 in words is "two hundred forty-three billion, three hundred forty-three million, three hundred forty thousand, two hundred forty-two".