2556242413 has 2 divisors, whose sum is σ = 2556242414. Its totient is φ = 2556242412.

The previous prime is 2556242369. The next prime is 2556242441. The reversal of 2556242413 is 3142426552.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1562858089 + 993384324 = 39533^2 + 31518^2 .

It is a cyclic number.

It is not a de Polignac number, because 2556242413 - 2⁹ = 2556241901 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2556240413) by changing a digit.

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 as a sum of consecutive naturals, namely, 1278121206 + 1278121207.

It is an arithmetic number, because the mean of its divisors is an integer number (1278121207).

Almost surely, 2^2556242413 is an apocalyptic number.

It is an amenable number.

2556242413 is a deficient number, since it is larger than the sum of its proper divisors (1).

2556242413 is an equidigital number, since it uses as much as digits as its factorization.

2556242413 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 57600, while the sum is 34.

The square root of 2556242413 is about 50559.2960097349. The cubic root of 2556242413 is about 1367.3111188314.

Adding to 2556242413 its reverse (3142426552), we get a palindrome (5698668965).

The spelling of 2556242413 in words is "two billion, five hundred fifty-six million, two hundred forty-two thousand, four hundred thirteen".