2156133312 has 84 divisors (see below), whose sum is σ = 6194446336. Its totient is φ = 717050880.

The previous prime is 2156133311. The next prime is 2156133337. The reversal of 2156133312 is 2133316512.

2156133312 is a `hidden beast` number, since 2 + 1 + 5 + 613 + 33 + 12 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2156133311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 259137 + ... + 267327.

Almost surely, 2^2156133312 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 2156133312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3097223168).

2156133312 is an abundant number, since it is smaller than the sum of its proper divisors (4038313024).

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

2156133312 is a wasteful number, since it uses less digits than its factorization.

2156133312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8666 (or 8653 counting only the distinct ones).

The product of its digits is 3240, while the sum is 27.

The square root of 2156133312 is about 46434.1825813699. The cubic root of 2156133312 is about 1291.8890082200.

Adding to 2156133312 its reverse (2133316512), we get a palindrome (4289449824).

The spelling of 2156133312 in words is "two billion, one hundred fifty-six million, one hundred thirty-three thousand, three hundred twelve".