2140065205 has 4 divisors (see below), whose sum is σ = 2568078252. Its totient is φ = 1712052160.

The previous prime is 2140065181. The next prime is 2140065211. The reversal of 2140065205 is 5025600412.

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

It can be written as a sum of positive squares in 2 ways, for example, as 922822884 + 1217242321 = 30378^2 + 34889^2 .

It is not a de Polignac number, because 2140065205 - 2²⁷ = 2005847477 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2140065205.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 214006516 + ... + 214006525.

It is an arithmetic number, because the mean of its divisors is an integer number (642019563).

Almost surely, 2^2140065205 is an apocalyptic number.

It is an amenable number.

2140065205 is a deficient number, since it is larger than the sum of its proper divisors (428013047).

2140065205 is an equidigital number, since it uses as much as digits as its factorization.

2140065205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 428013046.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 2140065205 is about 46260.8387840082. The cubic root of 2140065205 is about 1288.6718307259.

Adding to 2140065205 its reverse (5025600412), we get a palindrome (7165665617).

The spelling of 2140065205 in words is "two billion, one hundred forty million, sixty-five thousand, two hundred five".