2164440305 has 16 divisors (see below), whose sum is σ = 2699136000. Its totient is φ = 1664431680.

The previous prime is 2164440281. The next prime is 2164440329. The reversal of 2164440305 is 5030444612.

It is an interprime number because it is at equal distance from previous prime (2164440281) and next prime (2164440329).

It is not a de Polignac number, because 2164440305 - 2⁸ = 2164440049 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23765 + ... + 69954.

It is an arithmetic number, because the mean of its divisors is an integer number (168696000).

Almost surely, 2^2164440305 is an apocalyptic number.

It is an amenable number.

2164440305 is a deficient number, since it is larger than the sum of its proper divisors (534695695).

2164440305 is a wasteful number, since it uses less digits than its factorization.

2164440305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93904.

The product of its (nonzero) digits is 11520, while the sum is 29.

The square root of 2164440305 is about 46523.5457053737. The cubic root of 2164440305 is about 1293.5459806333.

Adding to 2164440305 its reverse (5030444612), we get a palindrome (7194884917).

The spelling of 2164440305 in words is "two billion, one hundred sixty-four million, four hundred forty thousand, three hundred five".