2165632447 has 4 divisors (see below), whose sum is σ = 2362508136. Its totient is φ = 1968756760.

The previous prime is 2165632439. The next prime is 2165632463. The reversal of 2165632447 is 7442365612.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2165632447 - 2³ = 2165632439 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2165632747) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 98437828 + ... + 98437849.

It is an arithmetic number, because the mean of its divisors is an integer number (590627034).

Almost surely, 2^2165632447 is an apocalyptic number.

2165632447 is a deficient number, since it is larger than the sum of its proper divisors (196875689).

2165632447 is a wasteful number, since it uses less digits than its factorization.

2165632447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196875688.

The product of its digits is 241920, while the sum is 40.

The square root of 2165632447 is about 46536.3561852451. The cubic root of 2165632447 is about 1293.7834257679.

The spelling of 2165632447 in words is "two billion, one hundred sixty-five million, six hundred thirty-two thousand, four hundred forty-seven".