2162105128 has 16 divisors (see below), whose sum is σ = 4054572000. Its totient is φ = 1080885936.

The previous prime is 2162105123. The next prime is 2162105129. The reversal of 2162105128 is 8215012612.

It is a junction number, because it is equal to n+sod(n) for n = 2162105096 and 2162105105.

It is not an unprimeable number, because it can be changed into a prime (2162105123) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47503 + ... + 81121.

It is an arithmetic number, because the mean of its divisors is an integer number (253410750).

Almost surely, 2^2162105128 is an apocalyptic number.

It is an amenable number.

2162105128 is a deficient number, since it is larger than the sum of its proper divisors (1892466872).

2162105128 is a wasteful number, since it uses less digits than its factorization.

2162105128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41664 (or 41660 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 28.

The square root of 2162105128 is about 46498.4422104655. The cubic root of 2162105128 is about 1293.0806184826.

The spelling of 2162105128 in words is "two billion, one hundred sixty-two million, one hundred five thousand, one hundred twenty-eight".