2163275128 has 96 divisors (see below), whose sum is σ = 4860777600. Its totient is φ = 899404800.

The previous prime is 2163275123. The next prime is 2163275131. The reversal of 2163275128 is 8215723612.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2163275123) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4515993 + ... + 4516471.

It is an arithmetic number, because the mean of its divisors is an integer number (50633100).

Almost surely, 2^2163275128 is an apocalyptic number.

2163275128 is a gapful number since it is divisible by the number (28) 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 2163275128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2430388800).

2163275128 is an abundant number, since it is smaller than the sum of its proper divisors (2697502472).

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

2163275128 is a wasteful number, since it uses less digits than its factorization.

2163275128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 821 (or 810 counting only the distinct ones).

The product of its digits is 40320, while the sum is 37.

The square root of 2163275128 is about 46511.0215755363. The cubic root of 2163275128 is about 1293.3138219916.

The spelling of 2163275128 in words is "two billion, one hundred sixty-three million, two hundred seventy-five thousand, one hundred twenty-eight".