55855900 has 36 divisors (see below), whose sum is σ = 122304672. Its totient is φ = 22140160.

The previous prime is 55855873. The next prime is 55855907. The reversal of 55855900 is 955855.

It is a self number, because there is not a number n which added to its sum of digits gives 55855900.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55855907) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8829 + ... + 13771.

It is an arithmetic number, because the mean of its divisors is an integer number (3397352).

Almost surely, 2^55855900 is an apocalyptic number.

55855900 is a gapful number since it is divisible by the number (50) 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 55855900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (61152336).

55855900 is an abundant number, since it is smaller than the sum of its proper divisors (66448772).

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

55855900 is a wasteful number, since it uses less digits than its factorization.

55855900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5070 (or 5063 counting only the distinct ones).

The product of its (nonzero) digits is 45000, while the sum is 37.

The square root of 55855900 is about 7473.6804855439. The cubic root of 55855900 is about 382.2577958873.

The spelling of 55855900 in words is "fifty-five million, eight hundred fifty-five thousand, nine hundred".