43044421 has 16 divisors (see below), whose sum is σ = 50079744. Its totient is φ = 36237744.

The previous prime is 43044409. The next prime is 43044437. The reversal of 43044421 is 12444034.

It is a cyclic number.

It is not a de Polignac number, because 43044421 - 2¹⁷ = 42913349 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 43044392 and 43044401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43044121) 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, 163536 + ... + 163798.

It is an arithmetic number, because the mean of its divisors is an integer number (3129984).

Almost surely, 2^43044421 is an apocalyptic number.

It is an amenable number.

43044421 is a deficient number, since it is larger than the sum of its proper divisors (7035323).

43044421 is a wasteful number, since it uses less digits than its factorization.

43044421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 600.

The product of its (nonzero) digits is 1536, while the sum is 22.

The square root of 43044421 is about 6560.8247194998. The cubic root of 43044421 is about 350.4604036254.

Adding to 43044421 its reverse (12444034), we get a palindrome (55488455).

The spelling of 43044421 in words is "forty-three million, forty-four thousand, four hundred twenty-one".