43085521 has 8 divisors (see below), whose sum is σ = 45460800. Its totient is φ = 40721040.

The previous prime is 43085491. The next prime is 43085551. The reversal of 43085521 is 12558034.

43085521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (43085491) and next prime (43085551).

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

It is a cyclic number.

It is not a de Polignac number, because 43085521 - 2¹³ = 43077329 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 43085521.

It is not an unprimeable number, because it can be changed into a prime (43085551) 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, 6300 + ... + 11218.

It is an arithmetic number, because the mean of its divisors is an integer number (5682600).

Almost surely, 2^43085521 is an apocalyptic number.

It is an amenable number.

43085521 is a deficient number, since it is larger than the sum of its proper divisors (2375279).

43085521 is a wasteful number, since it uses less digits than its factorization.

43085521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5399.

The product of its (nonzero) digits is 4800, while the sum is 28.

The square root of 43085521 is about 6563.9562003414. The cubic root of 43085521 is about 350.5719112282.

The spelling of 43085521 in words is "forty-three million, eighty-five thousand, five hundred twenty-one".