43625621 has 16 divisors (see below), whose sum is σ = 49984704. Its totient is φ = 37718784.

The previous prime is 43625611. The next prime is 43625639. The reversal of 43625621 is 12652634.

43625621 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 43625621 - 2¹⁰ = 43624597 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43625611) 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 15 ways as a sum of consecutive naturals, for example, 67526 + ... + 68168.

It is an arithmetic number, because the mean of its divisors is an integer number (3124044).

Almost surely, 2^43625621 is an apocalyptic number.

It is an amenable number.

43625621 is a deficient number, since it is larger than the sum of its proper divisors (6359083).

43625621 is a wasteful number, since it uses less digits than its factorization.

43625621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 980.

The product of its digits is 8640, while the sum is 29.

The square root of 43625621 is about 6604.9694170374. The cubic root of 43625621 is about 352.0307012005.

The spelling of 43625621 in words is "forty-three million, six hundred twenty-five thousand, six hundred twenty-one".