2101153500 has 384 divisors, whose sum is σ = 7271147520. Its totient is φ = 522720000.

The previous prime is 2101153463. The next prime is 2101153507. The reversal of 2101153500 is 53511012.

2101153500 is a `hidden beast` number, since 2 + 10 + 1 + 153 + 500 = 666.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2101153507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 20803450 + ... + 20803550.

It is an arithmetic number, because the mean of its divisors is an integer number (18935280).

Almost surely, 2^2101153500 is an apocalyptic number.

2101153500 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 2101153500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3635573760).

2101153500 is an abundant number, since it is smaller than the sum of its proper divisors (5169994020).

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

2101153500 is a wasteful number, since it uses less digits than its factorization.

2101153500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219 (or 201 counting only the distinct ones).

The product of its (nonzero) digits is 150, while the sum is 18.

The square root of 2101153500 is about 45838.3409385636. The cubic root of 2101153500 is about 1280.8135900177.

Adding to 2101153500 its reverse (53511012), we get a palindrome (2154664512).

The spelling of 2101153500 in words is "two billion, one hundred one million, one hundred fifty-three thousand, five hundred".