55100500 has 144 divisors (see below), whose sum is σ = 151626384. Its totient is φ = 17337600.

The previous prime is 55100491. The next prime is 55100503. The reversal of 55100500 is 500155.

It can be written as a sum of positive squares in 8 ways, for example, as 15586704 + 39513796 = 3948^2 + 6286^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55100503) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 318414 + ... + 318586.

It is an arithmetic number, because the mean of its divisors is an integer number (1052961).

Almost surely, 2^55100500 is an apocalyptic number.

55100500 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 55100500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (75813192).

55100500 is an abundant number, since it is smaller than the sum of its proper divisors (96525884).

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

55100500 is a wasteful number, since it uses less digits than its factorization.

55100500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219 (or 200 counting only the distinct ones).

The product of its (nonzero) digits is 125, while the sum is 16.

The square root of 55100500 is about 7422.9711032713. The cubic root of 55100500 is about 380.5267395100.

Adding to 55100500 its reverse (500155), we get a palindrome (55600655).

It can be divided in two parts, 5 and 5100500, that multiplied together give a square (25502500 = 5050²).

The spelling of 55100500 in words is "fifty-five million, one hundred thousand, five hundred".