55397056 has 56 divisors (see below), whose sum is σ = 129168144. Its totient is φ = 23239680.

The previous prime is 55397051. The next prime is 55397057. The reversal of 55397056 is 65079355.

It is not an unprimeable number, because it can be changed into a prime (55397051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6126 + ... + 12178.

It is an arithmetic number, because the mean of its divisors is an integer number (2306574).

Almost surely, 2^55397056 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 55397056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (64584072).

55397056 is an abundant number, since it is smaller than the sum of its proper divisors (73771088).

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

55397056 is a wasteful number, since it uses less digits than its factorization.

55397056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6089 (or 6079 counting only the distinct ones).

The product of its (nonzero) digits is 141750, while the sum is 40.

The square root of 55397056 is about 7442.9198571528. The cubic root of 55397056 is about 381.2081951474.

The spelling of 55397056 in words is "fifty-five million, three hundred ninety-seven thousand, fifty-six".