43055557 has 8 divisors (see below), whose sum is σ = 43970040. Its totient is φ = 42144960.

The previous prime is 43055491. The next prime is 43055561. The reversal of 43055557 is 75555034.

43055557 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 30481441 + 12574116 = 5521^2 + 3546^2 .

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 43055557 - 2⁷ = 43055429 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 (43055567) 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, 34419 + ... + 35647.

It is an arithmetic number, because the mean of its divisors is an integer number (5496255).

Almost surely, 2^43055557 is an apocalyptic number.

It is an amenable number.

43055557 is a deficient number, since it is larger than the sum of its proper divisors (914483).

43055557 is a wasteful number, since it uses less digits than its factorization.

43055557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1943.

The product of its (nonzero) digits is 52500, while the sum is 34.

The square root of 43055557 is about 6561.6733384100. The cubic root of 43055557 is about 350.4906234964.

The spelling of 43055557 in words is "forty-three million, fifty-five thousand, five hundred fifty-seven".