55550240 has 96 divisors (see below), whose sum is σ = 137168640. Its totient is φ = 21243904.

The previous prime is 55550213. The next prime is 55550263. The reversal of 55550240 is 4205555.

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 15 ways as a sum of consecutive naturals, for example, 624116 + ... + 624204.

It is an arithmetic number, because the mean of its divisors is an integer number (1428840).

Almost surely, 2^55550240 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 55550240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68584320).

55550240 is an abundant number, since it is smaller than the sum of its proper divisors (81618400).

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

55550240 is a wasteful number, since it uses less digits than its factorization.

55550240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 234 (or 226 counting only the distinct ones).

The product of its (nonzero) digits is 5000, while the sum is 26.

The square root of 55550240 is about 7453.2033381627. The cubic root of 55550240 is about 381.5592442120.

Adding to 55550240 its reverse (4205555), we get a palindrome (59755795).

The spelling of 55550240 in words is "fifty-five million, five hundred fifty thousand, two hundred forty".