243621244 has 12 divisors (see below), whose sum is σ = 444873744. Its totient is φ = 116514464.

The previous prime is 243621241. The next prime is 243621247. The reversal of 243621244 is 442126342.

It is an interprime number because it is at equal distance from previous prime (243621241) and next prime (243621247).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243621241) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1323937 + ... + 1324120.

It is an arithmetic number, because the mean of its divisors is an integer number (37072812).

Almost surely, 2^243621244 is an apocalyptic number.

It is an amenable number.

243621244 is a deficient number, since it is larger than the sum of its proper divisors (201252500).

243621244 is a wasteful number, since it uses less digits than its factorization.

243621244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2648084 (or 2648082 counting only the distinct ones).

The product of its digits is 9216, while the sum is 28.

The square root of 243621244 is about 15608.3709592001. The cubic root of 243621244 is about 624.5564802188.

Adding to 243621244 its reverse (442126342), we get a palindrome (685747586).

The spelling of 243621244 in words is "two hundred forty-three million, six hundred twenty-one thousand, two hundred forty-four".