55081200 has 120 divisors (see below), whose sum is σ = 178100208. Its totient is φ = 14551040.

The previous prime is 55081199. The next prime is 55081211. The reversal of 55081200 is 218055.

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 polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 236284 + ... + 236516.

Almost surely, 2^55081200 is an apocalyptic number.

55081200 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 55081200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89050104).

55081200 is an abundant number, since it is smaller than the sum of its proper divisors (123019008).

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

55081200 is a wasteful number, since it uses less digits than its factorization.

55081200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 451 (or 440 counting only the distinct ones).

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

The square root of 55081200 is about 7421.6709708798. The cubic root of 55081200 is about 380.4823054079.

Adding to 55081200 its reverse (218055), we get a palindrome (55299255).

The spelling of 55081200 in words is "fifty-five million, eighty-one thousand, two hundred".