43055661 has 16 divisors (see below), whose sum is σ = 62763840. Its totient is φ = 26037120.

The previous prime is 43055659. The next prime is 43055671. The reversal of 43055661 is 16655034.

43055661 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 43055661 - 2¹ = 43055659 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43055641) 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, 17631 + ... + 19923.

It is an arithmetic number, because the mean of its divisors is an integer number (3922740).

Almost surely, 2^43055661 is an apocalyptic number.

It is an amenable number.

43055661 is a deficient number, since it is larger than the sum of its proper divisors (19708179).

43055661 is a wasteful number, since it uses less digits than its factorization.

43055661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2876.

The product of its (nonzero) digits is 10800, while the sum is 30.

The square root of 43055661 is about 6561.6812632130. The cubic root of 43055661 is about 350.4909056976.

The spelling of 43055661 in words is "forty-three million, fifty-five thousand, six hundred sixty-one".