55657056 has 192 divisors, whose sum is σ = 188310528. Its totient is φ = 13989888.

The previous prime is 55657039. The next prime is 55657057. The reversal of 55657056 is 65075655.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55657057) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 200790 + ... + 201066.

It is an arithmetic number, because the mean of its divisors is an integer number (980784).

Almost surely, 2^55657056 is an apocalyptic number.

55657056 is a gapful number since it is divisible by the number (56) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55657056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (94155264).

55657056 is an abundant number, since it is smaller than the sum of its proper divisors (132653472).

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

55657056 is a wasteful number, since it uses less digits than its factorization.

55657056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 333 (or 325 counting only the distinct ones).

The product of its (nonzero) digits is 157500, while the sum is 39.

The square root of 55657056 is about 7460.3656746838. The cubic root of 55657056 is about 381.8036508178.

It can be divided in two parts, 5565 and 7056, that added together give a palindrome (12621).

The spelling of 55657056 in words is "fifty-five million, six hundred fifty-seven thousand, fifty-six".