2556320323 has 2 divisors, whose sum is σ = 2556320324. Its totient is φ = 2556320322.

The previous prime is 2556320297. The next prime is 2556320329. The reversal of 2556320323 is 3230236552.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2556320323 is a prime.

It is not a weakly prime, because it can be changed into another prime (2556320329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1278160161 + 1278160162.

It is an arithmetic number, because the mean of its divisors is an integer number (1278160162).

Almost surely, 2^2556320323 is an apocalyptic number.

2556320323 is a deficient number, since it is larger than the sum of its proper divisors (1).

2556320323 is an equidigital number, since it uses as much as digits as its factorization.

2556320323 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32400, while the sum is 31.

The square root of 2556320323 is about 50560.0664853202. The cubic root of 2556320323 is about 1367.3250098102.

Adding to 2556320323 its reverse (3230236552), we get a palindrome (5786556875).

The spelling of 2556320323 in words is "two billion, five hundred fifty-six million, three hundred twenty thousand, three hundred twenty-three".