43523421 has 8 divisors (see below), whose sum is σ = 58164000. Its totient is φ = 28949232.

The previous prime is 43523399. The next prime is 43523437. The reversal of 43523421 is 12432534.

43523421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 43523421 - 2¹³ = 43515229 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 43523391 and 43523400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43523321) 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 7 ways as a sum of consecutive naturals, for example, 15046 + ... + 17703.

It is an arithmetic number, because the mean of its divisors is an integer number (7270500).

Almost surely, 2^43523421 is an apocalyptic number.

It is an amenable number.

43523421 is a deficient number, since it is larger than the sum of its proper divisors (14640579).

43523421 is a wasteful number, since it uses less digits than its factorization.

43523421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33195.

The product of its digits is 2880, while the sum is 24.

The square root of 43523421 is about 6597.2282816346. The cubic root of 43523421 is about 351.7555901698.

Adding to 43523421 its reverse (12432534), we get a palindrome (55955955).

The spelling of 43523421 in words is "forty-three million, five hundred twenty-three thousand, four hundred twenty-one".