2165328312 has 128 divisors (see below), whose sum is σ = 6531840000. Its totient is φ = 584343936.

The previous prime is 2165328287. The next prime is 2165328323. The reversal of 2165328312 is 2138235612.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1336639 + ... + 1338257.

It is an arithmetic number, because the mean of its divisors is an integer number (51030000).

Almost surely, 2^2165328312 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 2165328312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3265920000).

2165328312 is an abundant number, since it is smaller than the sum of its proper divisors (4366511688).

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

2165328312 is a wasteful number, since it uses less digits than its factorization.

2165328312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2073 (or 2069 counting only the distinct ones).

The product of its digits is 17280, while the sum is 33.

The square root of 2165328312 is about 46533.0883565662. The cubic root of 2165328312 is about 1293.7228578964.

The spelling of 2165328312 in words is "two billion, one hundred sixty-five million, three hundred twenty-eight thousand, three hundred twelve".