2162105280 has 168 divisors, whose sum is σ = 7595445312. Its totient is φ = 564258816.

The previous prime is 2162105279. The next prime is 2162105287. The reversal of 2162105280 is 825012612.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2162105287) 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, 127374 + ... + 143346.

It is an arithmetic number, because the mean of its divisors is an integer number (45210984).

Almost surely, 2^2162105280 is an apocalyptic number.

2162105280 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 2162105280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3797722656).

2162105280 is an abundant number, since it is smaller than the sum of its proper divisors (5433340032).

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

2162105280 is a wasteful number, since it uses less digits than its factorization.

2162105280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16043 (or 16030 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The square root of 2162105280 is about 46498.4438449288. The cubic root of 2162105280 is about 1293.0806487846.

Adding to 2162105280 its reverse (825012612), we get a palindrome (2987117892).

The spelling of 2162105280 in words is "two billion, one hundred sixty-two million, one hundred five thousand, two hundred eighty".