55572200 has 48 divisors (see below), whose sum is σ = 130200000. Its totient is φ = 22057920.

The previous prime is 55572137. The next prime is 55572203. The reversal of 55572200 is 227555.

It is a self number, because there is not a number n which added to its sum of digits gives 55572200.

It is not an unprimeable number, because it can be changed into a prime (55572203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 26801 + ... + 28799.

It is an arithmetic number, because the mean of its divisors is an integer number (2712500).

Almost surely, 2^55572200 is an apocalyptic number.

55572200 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 55572200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (65100000).

55572200 is an abundant number, since it is smaller than the sum of its proper divisors (74627800).

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

55572200 is a wasteful number, since it uses less digits than its factorization.

55572200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2154 (or 2145 counting only the distinct ones).

The product of its (nonzero) digits is 3500, while the sum is 26.

The square root of 55572200 is about 7454.6763846595. The cubic root of 55572200 is about 381.6095166448.

Adding to 55572200 its reverse (227555), we get a palindrome (55799755).

The spelling of 55572200 in words is "fifty-five million, five hundred seventy-two thousand, two hundred".