55850000220 has 144 divisors (see below), whose sum is σ = 193800454848. Its totient is φ = 12753377280.

The previous prime is 55850000209. The next prime is 55850000249. The reversal of 55850000220 is 2200005855.

55850000220 is a nontrivial binomial coefficient, being equal to C(334216, 2).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1315972 + ... + 1357748.

It is an arithmetic number, because the mean of its divisors is an integer number (1345836492).

Almost surely, 2^55850000220 is an apocalyptic number.

55850000220 is the 334215-th triangular number and also the 167108-th hexagonal number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55850000220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (96900227424).

55850000220 is an abundant number, since it is smaller than the sum of its proper divisors (137950454628).

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

55850000220 is a wasteful number, since it uses less digits than its factorization.

55850000220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42860 (or 42855 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 27.

The spelling of 55850000220 in words is "fifty-five billion, eight hundred fifty million, two hundred twenty", and thus it is an aban number.