2146520065 has 8 divisors (see below), whose sum is σ = 2577562920. Its totient is φ = 1716056832.

The previous prime is 2146520039. The next prime is 2146520083. The reversal of 2146520065 is 5600256412.

It can be written as a sum of positive squares in 4 ways, for example, as 1718721 + 2144801344 = 1311^2 + 46312^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 2146520065 - 2¹⁵ = 2146487297 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 136714 + ... + 151603.

It is an arithmetic number, because the mean of its divisors is an integer number (322195365).

Almost surely, 2^2146520065 is an apocalyptic number.

It is an amenable number.

2146520065 is a deficient number, since it is larger than the sum of its proper divisors (431042855).

2146520065 is a wasteful number, since it uses less digits than its factorization.

2146520065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 289811.

The product of its (nonzero) digits is 14400, while the sum is 31.

The square root of 2146520065 is about 46330.5521767224. The cubic root of 2146520065 is about 1289.9661600001.

Adding to 2146520065 its reverse (5600256412), we get a palindrome (7746776477).

The spelling of 2146520065 in words is "two billion, one hundred forty-six million, five hundred twenty thousand, sixty-five".