2109551136 has 288 divisors, whose sum is σ = 7156719360. Its totient is φ = 537868800.

The previous prime is 2109551113. The next prime is 2109551161. The reversal of 2109551136 is 6311559012.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a junction number, because it is equal to n+sod(n) for n = 2109551097 and 2109551106.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3052551 + ... + 3053241.

It is an arithmetic number, because the mean of its divisors is an integer number (24849720).

Almost surely, 2^2109551136 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2109551136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3578359680).

2109551136 is an abundant number, since it is smaller than the sum of its proper divisors (5047168224).

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

2109551136 is a wasteful number, since it uses less digits than its factorization.

2109551136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 788 (or 773 counting only the distinct ones).

The product of its (nonzero) digits is 8100, while the sum is 33.

The square root of 2109551136 is about 45929.8501630476. The cubic root of 2109551136 is about 1282.5176554079.

The spelling of 2109551136 in words is "two billion, one hundred nine million, five hundred fifty-one thousand, one hundred thirty-six".