55102800 has 120 divisors (see below), whose sum is σ = 180452736. Its totient is φ = 14366720.

The previous prime is 55102781. The next prime is 55102843. The reversal of 55102800 is 820155.

It is a tau number, because it is divible by the number of its divisors (120).

It is a congruent number.

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 23 ways as a sum of consecutive naturals, for example, 55912 + ... + 56888.

Almost surely, 2^55102800 is an apocalyptic number.

55102800 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 55102800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90226368).

55102800 is an abundant number, since it is smaller than the sum of its proper divisors (125349936).

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

55102800 is a wasteful number, since it uses less digits than its factorization.

55102800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1045 (or 1034 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 21.

The square root of 55102800 is about 7423.1260261429. The cubic root of 55102800 is about 380.5320340737.

Adding to 55102800 its reverse (820155), we get a palindrome (55922955).

The spelling of 55102800 in words is "fifty-five million, one hundred two thousand, eight hundred".