2141720065 has 8 divisors (see below), whose sum is σ = 2612196648. Its totient is φ = 1685287680.

The previous prime is 2141720051. The next prime is 2141720069. The reversal of 2141720065 is 5600271412.

It can be written as a sum of positive squares in 4 ways, for example, as 4322241 + 2137397824 = 2079^2 + 46232^2 .

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

It is not a de Polignac number, because 2141720065 - 2¹¹ = 2141718017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2141720069) 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, 3510712 + ... + 3511321.

It is an arithmetic number, because the mean of its divisors is an integer number (326524581).

Almost surely, 2^2141720065 is an apocalyptic number.

It is an amenable number.

2141720065 is a deficient number, since it is larger than the sum of its proper divisors (470476583).

2141720065 is an equidigital number, since it uses as much as digits as its factorization.

2141720065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7022099.

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 2141720065 is about 46278.7215143202. The cubic root of 2141720065 is about 1289.0039112638.

Adding to 2141720065 its reverse (5600271412), we get a palindrome (7741991477).

The spelling of 2141720065 in words is "two billion, one hundred forty-one million, seven hundred twenty thousand, sixty-five".