2161300 has 18 divisors (see below), whose sum is σ = 4690238. Its totient is φ = 864480.

The previous prime is 2161297. The next prime is 2161301. The reversal of 2161300 is 31612.

It can be written as a sum of positive squares in 3 ways, for example, as 749956 + 1411344 = 866^2 + 1188^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2161301) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10707 + ... + 10906.

2^2161300 is an apocalyptic number.

2161300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2161300 is an abundant number, since it is smaller than the sum of its proper divisors (2528938).

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

2161300 is a wasteful number, since it uses less digits than its factorization.

2161300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21627 (or 21620 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 2161300 is about 1470.1360481262. The cubic root of 2161300 is about 129.2920092112.

Adding to 2161300 its reverse (31612), we get a palindrome (2192912).

The spelling of 2161300 in words is "two million, one hundred sixty-one thousand, three hundred".