243220344 has 16 divisors (see below), whose sum is σ = 608050920. Its totient is φ = 81073440.

The previous prime is 243220321. The next prime is 243220363. The reversal of 243220344 is 443022342.

It is a super-2 number, since 2×243220344² = 118312271470956672, which contains 22 as substring.

It is a hoax number, since the sum of its digits (24) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (24), and also a Moran number because the ratio is a prime number: 10134181 = 243220344 / (2 + 4 + 3 + 2 + 2 + 0 + 3 + 4 + 4).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5067067 + ... + 5067114.

Almost surely, 2^243220344 is an apocalyptic number.

243220344 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

243220344 is an abundant number, since it is smaller than the sum of its proper divisors (364830576).

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

243220344 is a wasteful number, since it uses less digits than its factorization.

243220344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10134190 (or 10134186 counting only the distinct ones).

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

The square root of 243220344 is about 15595.5232037915. The cubic root of 243220344 is about 624.2137047451.

Adding to 243220344 its reverse (443022342), we get a palindrome (686242686).

The spelling of 243220344 in words is "two hundred forty-three million, two hundred twenty thousand, three hundred forty-four".