55225856 has 80 divisors (see below), whose sum is σ = 132908160. Its totient is φ = 22394880.

The previous prime is 55225847. The next prime is 55225861. The reversal of 55225856 is 65852255.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67691 + ... + 68501.

It is an arithmetic number, because the mean of its divisors is an integer number (1661352).

Almost surely, 2^55225856 is an apocalyptic number.

55225856 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 55225856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (66454080).

55225856 is an abundant number, since it is smaller than the sum of its proper divisors (77682304).

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

55225856 is an equidigital number, since it uses as much as digits as its factorization.

55225856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 855 (or 839 counting only the distinct ones).

The product of its digits is 120000, while the sum is 38.

The square root of 55225856 is about 7431.4100949954. The cubic root of 55225856 is about 380.8150924979.

The spelling of 55225856 in words is "fifty-five million, two hundred twenty-five thousand, eight hundred fifty-six".