2556421303 has 2 divisors, whose sum is σ = 2556421304. Its totient is φ = 2556421302.

The previous prime is 2556421297. The next prime is 2556421313. The reversal of 2556421303 is 3031246552.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2556421303 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2556421313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1278210651 + 1278210652.

It is an arithmetic number, because the mean of its divisors is an integer number (1278210652).

Almost surely, 2^2556421303 is an apocalyptic number.

2556421303 is a deficient number, since it is larger than the sum of its proper divisors (1).

2556421303 is an equidigital number, since it uses as much as digits as its factorization.

2556421303 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21600, while the sum is 31.

The square root of 2556421303 is about 50561.0650896517. The cubic root of 2556421303 is about 1367.3430136391.

Adding to 2556421303 its reverse (3031246552), we get a palindrome (5587667855).

The spelling of 2556421303 in words is "two billion, five hundred fifty-six million, four hundred twenty-one thousand, three hundred three".