55043388 has 36 divisors (see below), whose sum is σ = 144293240. Its totient is φ = 18347472.

The previous prime is 55043377. The next prime is 55043413. The reversal of 55043388 is 88334055.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 27343 + ... + 29286.

Almost surely, 2^55043388 is an apocalyptic number.

It is an amenable number.

55043388 is an abundant number, since it is smaller than the sum of its proper divisors (89249852).

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

55043388 is a wasteful number, since it uses less digits than its factorization.

55043388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56648 (or 56634 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 36.

The square root of 55043388 is about 7419.1231287801. The cubic root of 55043388 is about 380.3952213075.

The spelling of 55043388 in words is "fifty-five million, forty-three thousand, three hundred eighty-eight".