55000443 has 8 divisors (see below), whose sum is σ = 75862800. Its totient is φ = 35402528.

The previous prime is 55000403. The next prime is 55000469. The reversal of 55000443 is 34400055.

It is a happy number.

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 55000443 - 2¹⁶ = 54934907 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55000403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 316008 + ... + 316181.

It is an arithmetic number, because the mean of its divisors is an integer number (9482850).

Almost surely, 2^55000443 is an apocalyptic number.

55000443 is a deficient number, since it is larger than the sum of its proper divisors (20862357).

55000443 is a wasteful number, since it uses less digits than its factorization.

55000443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 632221.

The product of its (nonzero) digits is 1200, while the sum is 21.

The square root of 55000443 is about 7416.2283540894. The cubic root of 55000443 is about 380.2962671085.

Adding to 55000443 its reverse (34400055), we get a palindrome (89400498).

The spelling of 55000443 in words is "fifty-five million, four hundred forty-three", and thus it is an aban number.