55351140 has 96 divisors (see below), whose sum is σ = 172730880. Its totient is φ = 13149696.

The previous prime is 55351139. The next prime is 55351159. The reversal of 55351140 is 4115355.

55351140 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 55351140.

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 31 ways as a sum of consecutive naturals, for example, 21397 + ... + 23843.

It is an arithmetic number, because the mean of its divisors is an integer number (1799280).

Almost surely, 2^55351140 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 55351140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (86365440).

55351140 is an abundant number, since it is smaller than the sum of its proper divisors (117379740).

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

55351140 is a wasteful number, since it uses less digits than its factorization.

55351140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2501 (or 2499 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 24.

The square root of 55351140 is about 7439.8346755825. The cubic root of 55351140 is about 381.1028442200.

Adding to 55351140 its reverse (4115355), we get a palindrome (59466495).

The spelling of 55351140 in words is "fifty-five million, three hundred fifty-one thousand, one hundred forty".