243320442 has 8 divisors (see below), whose sum is σ = 486640896. Its totient is φ = 81106812.

The previous prime is 243320431. The next prime is 243320449. The reversal of 243320442 is 244023342.

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

243320442 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (243320449) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 20276698 + ... + 20276709.

It is an arithmetic number, because the mean of its divisors is an integer number (60830112).

Almost surely, 2^243320442 is an apocalyptic number.

243320442 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

243320442 is a wasteful number, since it uses less digits than its factorization.

243320442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40553412.

The product of its (nonzero) digits is 4608, while the sum is 24.

The square root of 243320442 is about 15598.7320638570. The cubic root of 243320442 is about 624.2993252881.

Adding to 243320442 its reverse (244023342), we get a palindrome (487343784).

The spelling of 243320442 in words is "two hundred forty-three million, three hundred twenty thousand, four hundred forty-two".