2112651565 has 8 divisors (see below), whose sum is σ = 2535526008. Its totient is φ = 1689891840.

The previous prime is 2112651559. The next prime is 2112651587. The reversal of 2112651565 is 5651562112.

It can be written as a sum of positive squares in 4 ways, for example, as 71961289 + 2040690276 = 8483^2 + 45174^2 .

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

It is not a de Polignac number, because 2112651565 - 2⁹ = 2112651053 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 2112651565.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19069 + ... + 67741.

It is an arithmetic number, because the mean of its divisors is an integer number (316940751).

Almost surely, 2^2112651565 is an apocalyptic number.

It is an amenable number.

2112651565 is a deficient number, since it is larger than the sum of its proper divisors (422874443).

2112651565 is an equidigital number, since it uses as much as digits as its factorization.

2112651565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57359.

The product of its digits is 18000, while the sum is 34.

The square root of 2112651565 is about 45963.5895573877. The cubic root of 2112651565 is about 1283.1456576439.

The spelling of 2112651565 in words is "two billion, one hundred twelve million, six hundred fifty-one thousand, five hundred sixty-five".