55381344 has 24 divisors (see below), whose sum is σ = 145376280. Its totient is φ = 18460416.

The previous prime is 55381331. The next prime is 55381357. The reversal of 55381344 is 44318355.

It is an interprime number because it is at equal distance from previous prime (55381331) and next prime (55381357).

It is a tau number, because it is divible by the number of its divisors (24).

It is a congruent number.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 288349 + ... + 288540.

It is an arithmetic number, because the mean of its divisors is an integer number (6057345).

Almost surely, 2^55381344 is an apocalyptic number.

It is an amenable number.

55381344 is an abundant number, since it is smaller than the sum of its proper divisors (89994936).

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

55381344 is a wasteful number, since it uses less digits than its factorization.

55381344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 576902 (or 576894 counting only the distinct ones).

The product of its digits is 28800, while the sum is 33.

The square root of 55381344 is about 7441.8642825572. The cubic root of 55381344 is about 381.1721516586.

Adding to 55381344 its reverse (44318355), we get a palindrome (99699699).

The spelling of 55381344 in words is "fifty-five million, three hundred eighty-one thousand, three hundred forty-four".