2559201565 has 4 divisors (see below), whose sum is σ = 3071041884. Its totient is φ = 2047361248.

The previous prime is 2559201553. The next prime is 2559201569. The reversal of 2559201565 is 5651029552.

It is a happy number.

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 813048196 + 1746153369 = 28514^2 + 41787^2 .

It is a cyclic number.

It is not a de Polignac number, because 2559201565 - 2²¹ = 2557104413 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 (2559201569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 255920152 + ... + 255920161.

It is an arithmetic number, because the mean of its divisors is an integer number (767760471).

Almost surely, 2^2559201565 is an apocalyptic number.

It is an amenable number.

2559201565 is a deficient number, since it is larger than the sum of its proper divisors (511840319).

2559201565 is an equidigital number, since it uses as much as digits as its factorization.

2559201565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 511840318.

The product of its (nonzero) digits is 135000, while the sum is 40.

The square root of 2559201565 is about 50588.5517187436. The cubic root of 2559201565 is about 1367.8385233194.

The spelling of 2559201565 in words is "two billion, five hundred fifty-nine million, two hundred one thousand, five hundred sixty-five".