5555500 has 48 divisors (see below), whose sum is σ = 12475008. Its totient is φ = 2160000.

The previous prime is 5555497. The next prime is 5555507. The reversal of 5555500 is 55555.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a nialpdrome in base 10.

It is a zygodrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5555507) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20365 + ... + 20635.

It is an arithmetic number, because the mean of its divisors is an integer number (259896).

Almost surely, 2^5555500 is an apocalyptic number.

5555500 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 5555500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6237504).

5555500 is an abundant number, since it is smaller than the sum of its proper divisors (6919508).

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

5555500 is a wasteful number, since it uses less digits than its factorization.

5555500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 331 (or 319 counting only the distinct ones).

The product of its (nonzero) digits is 3125, while the sum is 25.

The square root of 5555500 is about 2357.0108188127. The cubic root of 5555500 is about 177.1091711626.

Subtracting from 5555500 its reverse (55555), we obtain a palindrome (5499945).

Multiplying 5555500 by its reverse (55555), we get a square (308635802500 = 555550²).

5555500 divided by its reverse (55555) gives a square (100 = 10²).

It can be divided in two parts, 55 and 55500, that added together give a palindrome (55555).

The spelling of 5555500 in words is "five million, five hundred fifty-five thousand, five hundred".