43222420 has 12 divisors (see below), whose sum is σ = 90767124. Its totient is φ = 17288960.

The previous prime is 43222411. The next prime is 43222447. The reversal of 43222420 is 2422234.

It can be written as a sum of positive squares in 2 ways, for example, as 4334724 + 38887696 = 2082^2 + 6236^2 .

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1080541 + ... + 1080580.

It is an arithmetic number, because the mean of its divisors is an integer number (7563927).

Almost surely, 2^43222420 is an apocalyptic number.

It is an amenable number.

43222420 is an abundant number, since it is smaller than the sum of its proper divisors (47544704).

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

43222420 is a wasteful number, since it uses less digits than its factorization.

43222420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2161130 (or 2161128 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 19.

The square root of 43222420 is about 6574.3760160186. The cubic root of 43222420 is about 350.9428185301.

Adding to 43222420 its reverse (2422234), we get a palindrome (45644654).

The spelling of 43222420 in words is "forty-three million, two hundred twenty-two thousand, four hundred twenty".