43055550 has 60 divisors (see below), whose sum is σ = 119641896. Its totient is φ = 11480400.

The previous prime is 43055491. The next prime is 43055561. The reversal of 43055550 is 5555034.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 1266 + ... + 9365.

Almost surely, 2^43055550 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 43055550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (59820948).

43055550 is an abundant number, since it is smaller than the sum of its proper divisors (76586346).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

43055550 is a wasteful number, since it uses less digits than its factorization.

43055550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10655 (or 10641 counting only the distinct ones).

The product of its (nonzero) digits is 7500, while the sum is 27.

The square root of 43055550 is about 6561.6728050094. The cubic root of 43055550 is about 350.4906045020.

The spelling of 43055550 in words is "forty-three million, fifty-five thousand, five hundred fifty".