43222218 has 32 divisors (see below), whose sum is σ = 93744000. Its totient is φ = 13206336.

The previous prime is 43222217. The next prime is 43222219. The reversal of 43222218 is 81222234.

It is an interprime number because it is at equal distance from previous prime (43222217) and next prime (43222219).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (43222213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9763 + ... + 13481.

It is an arithmetic number, because the mean of its divisors is an integer number (2929500).

Almost surely, 2^43222218 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 43222218, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46872000).

43222218 is an abundant number, since it is smaller than the sum of its proper divisors (50521782).

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

43222218 is a wasteful number, since it uses less digits than its factorization.

43222218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3886.

The product of its digits is 1536, while the sum is 24.

The square root of 43222218 is about 6574.3606533259. The cubic root of 43222218 is about 350.9422718187.

The spelling of 43222218 in words is "forty-three million, two hundred twenty-two thousand, two hundred eighteen".