243224421 has 32 divisors (see below), whose sum is σ = 375926400. Its totient is φ = 138458880.

The previous prime is 243224411. The next prime is 243224441. The reversal of 243224421 is 124422342.

It is a de Polignac number, because none of the positive numbers 2^k-243224421 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 243224391 and 243224400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243224411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 31975 + ... + 38843.

It is an arithmetic number, because the mean of its divisors is an integer number (11747700).

Almost surely, 2^243224421 is an apocalyptic number.

It is an amenable number.

243224421 is a deficient number, since it is larger than the sum of its proper divisors (132701979).

243224421 is a wasteful number, since it uses less digits than its factorization.

243224421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6949.

The product of its digits is 3072, while the sum is 24.

The square root of 243224421 is about 15595.6539138313. The cubic root of 243224421 is about 624.2171925360.

Adding to 243224421 its reverse (124422342), we get a palindrome (367646763).

The spelling of 243224421 in words is "two hundred forty-three million, two hundred twenty-four thousand, four hundred twenty-one".