55281344 has 14 divisors (see below), whose sum is σ = 109699044. Its totient is φ = 27640640.

The previous prime is 55281341. The next prime is 55281361. The reversal of 55281344 is 44318255.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a self number, because there is not a number n which added to its sum of digits gives 55281344.

It is not an unprimeable number, because it can be changed into a prime (55281341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 431822 + ... + 431949.

It is an arithmetic number, because the mean of its divisors is an integer number (7835646).

Almost surely, 2^55281344 is an apocalyptic number.

It is an amenable number.

55281344 is a deficient number, since it is larger than the sum of its proper divisors (54417700).

55281344 is an equidigital number, since it uses as much as digits as its factorization.

55281344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 863783 (or 863773 counting only the distinct ones).

The product of its digits is 19200, while the sum is 32.

The square root of 55281344 is about 7435.1425003156. The cubic root of 55281344 is about 380.9425907167.

Adding to 55281344 its reverse (44318255), we get a palindrome (99599599).

The spelling of 55281344 in words is "fifty-five million, two hundred eighty-one thousand, three hundred forty-four".