2559930221 has 2 divisors, whose sum is σ = 2559930222. Its totient is φ = 2559930220.

The previous prime is 2559930203. The next prime is 2559930259. The reversal of 2559930221 is 1220399552.

It is an a-pointer prime, because the next prime (2559930259) can be obtained adding 2559930221 to its sum of digits (38).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1609132996 + 950797225 = 40114^2 + 30835^2 .

It is a cyclic number.

It is not a de Polignac number, because 2559930221 - 2¹⁸ = 2559668077 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2559930271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1279965110 + 1279965111.

It is an arithmetic number, because the mean of its divisors is an integer number (1279965111).

Almost surely, 2^2559930221 is an apocalyptic number.

It is an amenable number.

2559930221 is a deficient number, since it is larger than the sum of its proper divisors (1).

2559930221 is an equidigital number, since it uses as much as digits as its factorization.

2559930221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48600, while the sum is 38.

The square root of 2559930221 is about 50595.7529937049. The cubic root of 2559930221 is about 1367.9683280189.

The spelling of 2559930221 in words is "two billion, five hundred fifty-nine million, nine hundred thirty thousand, two hundred twenty-one".