55178256 has 80 divisors (see below), whose sum is σ = 164683904. Its totient is φ = 15593472.

The previous prime is 55178197. The next prime is 55178281. The reversal of 55178256 is 65287155.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 31746 + ... + 33438.

Almost surely, 2^55178256 is an apocalyptic number.

55178256 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 55178256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82341952).

55178256 is an abundant number, since it is smaller than the sum of its proper divisors (109505648).

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

55178256 is a wasteful number, since it uses less digits than its factorization.

55178256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1808 (or 1802 counting only the distinct ones).

The product of its digits is 84000, while the sum is 39.

The square root of 55178256 is about 7428.2067822591. The cubic root of 55178256 is about 380.7056509541.

The spelling of 55178256 in words is "fifty-five million, one hundred seventy-eight thousand, two hundred fifty-six".