55603140 has 48 divisors (see below), whose sum is σ = 156936192. Its totient is φ = 14708736.

The previous prime is 55603127. The next prime is 55603157. The reversal of 55603140 is 4130655.

55603140 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 55603140.

It is an unprimeable number.

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, 3972 + ... + 11268.

It is an arithmetic number, because the mean of its divisors is an integer number (3269504).

Almost surely, 2^55603140 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 55603140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78468096).

55603140 is an abundant number, since it is smaller than the sum of its proper divisors (101333052).

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

55603140 is a wasteful number, since it uses less digits than its factorization.

55603140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7436 (or 7434 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 55603140 is about 7456.7513033492. The cubic root of 55603140 is about 381.6803242784.

Adding to 55603140 its reverse (4130655), we get a palindrome (59733795).

The spelling of 55603140 in words is "fifty-five million, six hundred three thousand, one hundred forty".