55271040 has 128 divisors (see below), whose sum is σ = 192265920. Its totient is φ = 13393920.

The previous prime is 55270991. The next prime is 55271077. The reversal of 55271040 is 4017255.

It is a tau number, because it is divible by the number of its divisors (128).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 55271040.

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, 19812 + ... + 22428.

Almost surely, 2^55271040 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 55271040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (96132960).

55271040 is an abundant number, since it is smaller than the sum of its proper divisors (136994880).

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

55271040 is a wasteful number, since it uses less digits than its factorization.

55271040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2650 (or 2638 counting only the distinct ones).

The product of its (nonzero) digits is 1400, while the sum is 24.

The square root of 55271040 is about 7434.4495425014. The cubic root of 55271040 is about 380.9189210295.

Adding to 55271040 its reverse (4017255), we get a palindrome (59288295).

The spelling of 55271040 in words is "fifty-five million, two hundred seventy-one thousand, forty".