2164051205 has 8 divisors (see below), whose sum is σ = 2600794104. Its totient is φ = 1728619200.

The previous prime is 2164051181. The next prime is 2164051207. The reversal of 2164051205 is 5021504612.

It can be written as a sum of positive squares in 4 ways, for example, as 281098756 + 1882952449 = 16766^2 + 43393^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2164051205 - 2¹⁰ = 2164050181 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 (2164051207) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 324086 + ... + 330695.

It is an arithmetic number, because the mean of its divisors is an integer number (325099263).

Almost surely, 2^2164051205 is an apocalyptic number.

It is an amenable number.

2164051205 is a deficient number, since it is larger than the sum of its proper divisors (436742899).

2164051205 is an equidigital number, since it uses as much as digits as its factorization.

2164051205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 655447.

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 2164051205 is about 46519.3637639209. The cubic root of 2164051205 is about 1293.4684626866.

Adding to 2164051205 its reverse (5021504612), we get a palindrome (7185555817).

The spelling of 2164051205 in words is "two billion, one hundred sixty-four million, fifty-one thousand, two hundred five".