55081844 has 6 divisors (see below), whose sum is σ = 96393234. Its totient is φ = 27540920.

The previous prime is 55081843. The next prime is 55081847. The reversal of 55081844 is 44818055.

55081844 is digitally balanced in base 9, 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 only one way, i.e., 35545444 + 19536400 = 5962^2 + 4420^2 .

55081844 is strictly pandigital in base 9.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55081843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6885227 + ... + 6885234.

It is an arithmetic number, because the mean of its divisors is an integer number (16065539).

Almost surely, 2^55081844 is an apocalyptic number.

It is an amenable number.

55081844 is a deficient number, since it is larger than the sum of its proper divisors (41311390).

55081844 is a wasteful number, since it uses less digits than its factorization.

55081844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13770465 (or 13770463 counting only the distinct ones).

The product of its (nonzero) digits is 25600, while the sum is 35.

The square root of 55081844 is about 7421.7143572089. The cubic root of 55081844 is about 380.4837882469.

Adding to 55081844 its reverse (44818055), we get a palindrome (99899899).

The spelling of 55081844 in words is "fifty-five million, eighty-one thousand, eight hundred forty-four".