55173312100 has 81 divisors (see below), whose sum is σ = 121615681593. Its totient is φ = 21726385440.

The previous prime is 55173312053. The next prime is 55173312109. The reversal of 55173312100 is 121337155.

The square root of 55173312100 is 234890.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 19862392356 + 35310919744 = 140934^2 + 187912^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55173312109) by changing a digit.

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 26 ways as a sum of consecutive naturals, for example, 194958559 + ... + 194958841.

Almost surely, 2^55173312100 is an apocalyptic number.

55173312100 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

55173312100 is the 234890-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55173312100

55173312100 is an abundant number, since it is smaller than the sum of its proper divisors (66442369493).

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

55173312100 is an equidigital number, since it uses as much as digits as its factorization.

55173312100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 746 (or 373 counting only the distinct ones).

The product of its (nonzero) digits is 3150, while the sum is 28.

Adding to 55173312100 its reverse (121337155), we get a palindrome (55294649255).

The spelling of 55173312100 in words is "fifty-five billion, one hundred seventy-three million, three hundred twelve thousand, one hundred".