55271140 has 48 divisors (see below), whose sum is σ = 120637440. Its totient is φ = 21248640.

The previous prime is 55271123. The next prime is 55271159. The reversal of 55271140 is 4117255.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 147994 + ... + 148366.

It is an arithmetic number, because the mean of its divisors is an integer number (2513280).

Almost surely, 2^55271140 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 55271140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (60318720).

55271140 is an abundant number, since it is smaller than the sum of its proper divisors (65366300).

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

55271140 is a wasteful number, since it uses less digits than its factorization.

55271140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 652 (or 650 counting only the distinct ones).

The product of its (nonzero) digits is 1400, while the sum is 25.

The square root of 55271140 is about 7434.4562679459. The cubic root of 55271140 is about 380.9191507572.

Adding to 55271140 its reverse (4117255), we get a palindrome (59388395).

The spelling of 55271140 in words is "fifty-five million, two hundred seventy-one thousand, one hundred forty".