40443221 has 24 divisors (see below), whose sum is σ = 53020224. Its totient is φ = 30101760.

The previous prime is 40443217. The next prime is 40443283. The reversal of 40443221 is 12234404.

40443221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 40443221 - 2² = 40443217 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40443193 and 40443202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40443211) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 19106 + ... + 21116.

It is an arithmetic number, because the mean of its divisors is an integer number (2209176).

Almost surely, 2^40443221 is an apocalyptic number.

It is an amenable number.

40443221 is a deficient number, since it is larger than the sum of its proper divisors (12577003).

40443221 is a wasteful number, since it uses less digits than its factorization.

40443221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2061 (or 2048 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 40443221 is about 6359.4984865161. The cubic root of 40443221 is about 343.2537144271.

Adding to 40443221 its reverse (12234404), we get a palindrome (52677625).

The spelling of 40443221 in words is "forty million, four hundred forty-three thousand, two hundred twenty-one".