55380144 has 20 divisors (see below), whose sum is σ = 143065496. Its totient is φ = 18460032.

The previous prime is 55380121. The next prime is 55380151. The reversal of 55380144 is 44108355.

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 576829 + ... + 576924.

Almost surely, 2^55380144 is an apocalyptic number.

It is an amenable number.

55380144 is an abundant number, since it is smaller than the sum of its proper divisors (87685352).

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

55380144 is a wasteful number, since it uses less digits than its factorization.

55380144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1153764 (or 1153758 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 30.

The square root of 55380144 is about 7441.7836571618. The cubic root of 55380144 is about 381.1693985661.

Adding to 55380144 its reverse (44108355), we get a palindrome (99488499).

The spelling of 55380144 in words is "fifty-five million, three hundred eighty thousand, one hundred forty-four".