2165399300 has 18 divisors (see below), whose sum is σ = 4698916698. Its totient is φ = 866159680.

The previous prime is 2165399287. The next prime is 2165399309. The reversal of 2165399300 is 39935612.

It can be written as a sum of positive squares in 3 ways, for example, as 6310144 + 2159089156 = 2512^2 + 46466^2 .

It is not an unprimeable number, because it can be changed into a prime (2165399309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10826897 + ... + 10827096.

Almost surely, 2^2165399300 is an apocalyptic number.

2165399300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2165399300 is an abundant number, since it is smaller than the sum of its proper divisors (2533517398).

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

2165399300 is a wasteful number, since it uses less digits than its factorization.

2165399300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21654007 (or 21654000 counting only the distinct ones).

The product of its (nonzero) digits is 43740, while the sum is 38.

The square root of 2165399300 is about 46533.8511193733. The cubic root of 2165399300 is about 1293.7369955207.

The spelling of 2165399300 in words is "two billion, one hundred sixty-five million, three hundred ninety-nine thousand, three hundred".