2105530000 has 150 divisors (see below), whose sum is σ = 5931356046. Its totient is φ = 721728000.

The previous prime is 2105529929. The next prime is 2105530027. The reversal of 2105530000 is 355012.

It can be written as a sum of positive squares in 5 ways, for example, as 788711056 + 1316818944 = 28084^2 + 36288^2 .

It is a Harshad number since it is a multiple of its sum of digits (16).

It is an unprimeable number.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 487852 + ... + 492148.

Almost surely, 2^2105530000 is an apocalyptic number.

2105530000 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 2105530000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2965678023).

2105530000 is an abundant number, since it is smaller than the sum of its proper divisors (3825826046).

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

2105530000 is an equidigital number, since it uses as much as digits as its factorization.

2105530000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4339 (or 4311 counting only the distinct ones).

The product of its (nonzero) digits is 150, while the sum is 16.

The square root of 2105530000 is about 45886.0545264027. The cubic root of 2105530000 is about 1281.7022436838.

Adding to 2105530000 its reverse (355012), we get a palindrome (2105885012).

The spelling of 2105530000 in words is "two billion, one hundred five million, five hundred thirty thousand".