2140343165 has 4 divisors (see below), whose sum is σ = 2568411804. Its totient is φ = 1712274528.

The previous prime is 2140343159. The next prime is 2140343167. The reversal of 2140343165 is 5613430412.

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 522533881 + 1617809284 = 22859^2 + 40222^2 .

It is a cyclic number.

It is not a de Polignac number, because 2140343165 - 2⁸ = 2140342909 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 (2140343167) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 214034312 + ... + 214034321.

It is an arithmetic number, because the mean of its divisors is an integer number (642102951).

Almost surely, 2^2140343165 is an apocalyptic number.

It is an amenable number.

2140343165 is a deficient number, since it is larger than the sum of its proper divisors (428068639).

2140343165 is an equidigital number, since it uses as much as digits as its factorization.

2140343165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 428068638.

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 2140343165 is about 46263.8429553793. The cubic root of 2140343165 is about 1288.7276208819.

Adding to 2140343165 its reverse (5613430412), we get a palindrome (7753773577).

The spelling of 2140343165 in words is "two billion, one hundred forty million, three hundred forty-three thousand, one hundred sixty-five".