243221344 has 12 divisors (see below), whose sum is σ = 478842084. Its totient is φ = 121610656.

The previous prime is 243221339. The next prime is 243221357. The reversal of 243221344 is 443122342.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3800302 + ... + 3800365.

It is an arithmetic number, because the mean of its divisors is an integer number (39903507).

Almost surely, 2^243221344 is an apocalyptic number.

It is an amenable number.

243221344 is a deficient number, since it is larger than the sum of its proper divisors (235620740).

243221344 is an equidigital number, since it uses as much as digits as its factorization.

243221344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7600677 (or 7600669 counting only the distinct ones).

The product of its digits is 4608, while the sum is 25.

The square root of 243221344 is about 15595.5552642412. Note that the first 3 decimals coincide. The cubic root of 243221344 is about 624.2145602285.

Adding to 243221344 its reverse (443122342), we get a palindrome (686343686).

The spelling of 243221344 in words is "two hundred forty-three million, two hundred twenty-one thousand, three hundred forty-four".