2101306500 has 72 divisors (see below), whose sum is σ = 6628935768. Its totient is φ = 560347200.

The previous prime is 2101306453. The next prime is 2101306531. The reversal of 2101306500 is 56031012.

2101306500 is a `hidden beast` number, since 2 + 1 + 0 + 13 + 0 + 650 + 0 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 165482496 + 1935824004 = 12864^2 + 43998^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 228979 + ... + 237978.

Almost surely, 2^2101306500 is an apocalyptic number.

2101306500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2101306500 is an abundant number, since it is smaller than the sum of its proper divisors (4527629268).

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

2101306500 is a wasteful number, since it uses less digits than its factorization.

2101306500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 466982 (or 466967 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

The square root of 2101306500 is about 45840.0098167529. The cubic root of 2101306500 is about 1280.8446776597.

Adding to 2101306500 its reverse (56031012), we get a palindrome (2157337512).

The spelling of 2101306500 in words is "two billion, one hundred one million, three hundred six thousand, five hundred".