2165215008 has 96 divisors (see below), whose sum is σ = 6302221632. Its totient is φ = 645350400.

The previous prime is 2165215007. The next prime is 2165215033. The reversal of 2165215008 is 8005125612.

It is a tau number, because it is divible by the number of its divisors (96).

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (2165215001) 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 15 ways as a sum of consecutive naturals, for example, 47610 + ... + 81222.

It is an arithmetic number, because the mean of its divisors is an integer number (65648142).

Almost surely, 2^2165215008 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 2165215008, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3151110816).

2165215008 is an abundant number, since it is smaller than the sum of its proper divisors (4137006624).

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

2165215008 is a wasteful number, since it uses less digits than its factorization.

2165215008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33698 (or 33690 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 30.

The square root of 2165215008 is about 46531.8708843734. The cubic root of 2165215008 is about 1293.7002921834.

The spelling of 2165215008 in words is "two billion, one hundred sixty-five million, two hundred fifteen thousand, eight".