2555216009 has 2 divisors, whose sum is σ = 2555216010. Its totient is φ = 2555216008.

The previous prime is 2555215963. The next prime is 2555216021. The reversal of 2555216009 is 9006125552.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2171839609 + 383376400 = 46603^2 + 19580^2 .

It is a cyclic number.

It is not a de Polignac number, because 2555216009 - 2²⁰ = 2554167433 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2555216009.

It is not a weakly prime, because it can be changed into another prime (2555216099) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1277608004 + 1277608005.

It is an arithmetic number, because the mean of its divisors is an integer number (1277608005).

Almost surely, 2^2555216009 is an apocalyptic number.

It is an amenable number.

2555216009 is a deficient number, since it is larger than the sum of its proper divisors (1).

2555216009 is an equidigital number, since it uses as much as digits as its factorization.

2555216009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27000, while the sum is 35.

The square root of 2555216009 is about 50549.1444932553. The cubic root of 2555216009 is about 1367.1280895703.

The spelling of 2555216009 in words is "two billion, five hundred fifty-five million, two hundred sixteen thousand, nine".