55000240 has 80 divisors (see below), whose sum is σ = 134009280. Its totient is φ = 20966400.

The previous prime is 55000207. The next prime is 55000243. The reversal of 55000240 is 4200055.

It is a happy number.

55000240 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (16).

It is not an unprimeable number, because it can be changed into a prime (55000243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 350242 + ... + 350398.

It is an arithmetic number, because the mean of its divisors is an integer number (1675116).

Almost surely, 2^55000240 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55000240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (67004640).

55000240 is an abundant number, since it is smaller than the sum of its proper divisors (79009040).

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

55000240 is a wasteful number, since it uses less digits than its factorization.

55000240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 350 (or 344 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 16.

The square root of 55000240 is about 7416.2146678747. The cubic root of 55000240 is about 380.2957992321.

Adding to 55000240 its reverse (4200055), we get a palindrome (59200295).

The spelling of 55000240 in words is "fifty-five million, two hundred forty", and thus it is an aban number.