201105500 has 48 divisors (see below), whose sum is σ = 462352800. Its totient is φ = 76204800.

The previous prime is 201105497. The next prime is 201105503. The reversal of 201105500 is 5501102.

It is an interprime number because it is at equal distance from previous prime (201105497) and next prime (201105503).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201105503) 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, 1085 + ... + 20084.

It is an arithmetic number, because the mean of its divisors is an integer number (9632350).

Almost surely, 2^201105500 is an apocalyptic number.

201105500 is a gapful number since it is divisible by the number (20) 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 201105500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (231176400).

201105500 is an abundant number, since it is smaller than the sum of its proper divisors (261247300).

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

201105500 is a wasteful number, since it uses less digits than its factorization.

201105500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21207 (or 21195 counting only the distinct ones).

The product of its (nonzero) digits is 50, while the sum is 14.

The square root of 201105500 is about 14181.1670887836. The cubic root of 201105500 is about 585.8790689585.

Adding to 201105500 its reverse (5501102), we get a palindrome (206606602).

The spelling of 201105500 in words is "two hundred one million, one hundred five thousand, five hundred".