2556847133 has 2 divisors, whose sum is σ = 2556847134. Its totient is φ = 2556847132.

The previous prime is 2556847079. The next prime is 2556847151. The reversal of 2556847133 is 3317486552.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1602160729 + 954686404 = 40027^2 + 30898^2 .

It is a cyclic number.

It is not a de Polignac number, because 2556847133 - 2²⁶ = 2489738269 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2556847333) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1278423566 + 1278423567.

It is an arithmetic number, because the mean of its divisors is an integer number (1278423567).

Almost surely, 2^2556847133 is an apocalyptic number.

It is an amenable number.

2556847133 is a deficient number, since it is larger than the sum of its proper divisors (1).

2556847133 is an equidigital number, since it uses as much as digits as its factorization.

2556847133 is an evil number, because the sum of its binary digits is even.

The product of its digits is 604800, while the sum is 44.

The square root of 2556847133 is about 50565.2759608805. The cubic root of 2556847133 is about 1367.4189300968.

The spelling of 2556847133 in words is "two billion, five hundred fifty-six million, eight hundred forty-seven thousand, one hundred thirty-three".