55281168 has 60 divisors (see below), whose sum is σ = 156918528. Its totient is φ = 18164160.

The previous prime is 55281157. The next prime is 55281169. The reversal of 55281168 is 86118255.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55281169) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7521 + ... + 12927.

Almost surely, 2^55281168 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 55281168, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78459264).

55281168 is an abundant number, since it is smaller than the sum of its proper divisors (101637360).

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

55281168 is a wasteful number, since it uses less digits than its factorization.

55281168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5492 (or 5483 counting only the distinct ones).

The product of its digits is 19200, while the sum is 36.

The square root of 55281168 is about 7435.1306646218. The cubic root of 55281168 is about 380.9421864454.

The spelling of 55281168 in words is "fifty-five million, two hundred eighty-one thousand, one hundred sixty-eight".