55000056 has 64 divisors (see below), whose sum is σ = 142354080. Its totient is φ = 17694720.

The previous prime is 55000031. The next prime is 55000069. The reversal of 55000056 is 65000055.

It is a junction number, because it is equal to n+sod(n) for n = 54999996 and 55000041.

It is a congruent number.

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, 213880 + ... + 214136.

Almost surely, 2^55000056 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 55000056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (71177040).

55000056 is an abundant number, since it is smaller than the sum of its proper divisors (87354024).

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

55000056 is a wasteful number, since it uses less digits than its factorization.

55000056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 544 (or 540 counting only the distinct ones).

The product of its (nonzero) digits is 750, while the sum is 21.

The square root of 55000056 is about 7416.2022626139. The cubic root of 55000056 is about 380.2953751460.

Subtracting 55000056 from its reverse (65000055), we obtain a palindrome (9999999).

The spelling of 55000056 in words is "fifty-five million, fifty-six", and thus it is an aban number and an uban number.