43218818 has 8 divisors (see below), whose sum is σ = 65186940. Its totient is φ = 21489840.

The previous prime is 43218793. The next prime is 43218821. The reversal of 43218818 is 81881234.

43218818 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 37540129 + 5678689 = 6127^2 + 2383^2 .

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

It is a super-4 number, since 4×43218818⁴ (a number of 32 digits) contains 4444 as substring.

It is an unprimeable number.

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, 59333 + ... + 60056.

Almost surely, 2^43218818 is an apocalyptic number.

43218818 is a deficient number, since it is larger than the sum of its proper divisors (21968122).

43218818 is a wasteful number, since it uses less digits than its factorization.

43218818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119572.

The product of its digits is 12288, while the sum is 35.

The square root of 43218818 is about 6574.1020679634. The cubic root of 43218818 is about 350.9330694913.

The spelling of 43218818 in words is "forty-three million, two hundred eighteen thousand, eight hundred eighteen".