2557056317 has 4 divisors (see below), whose sum is σ = 2565226140. Its totient is φ = 2548886496.

The previous prime is 2557056311. The next prime is 2557056319. The reversal of 2557056317 is 7136507552.

2557056317 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 277089316 + 2279967001 = 16646^2 + 47749^2 .

It is a cyclic number.

It is not a de Polignac number, because 2557056317 - 2¹² = 2557052221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2557056311) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4084442 + ... + 4085067.

It is an arithmetic number, because the mean of its divisors is an integer number (641306535).

Almost surely, 2^2557056317 is an apocalyptic number.

It is an amenable number.

2557056317 is a deficient number, since it is larger than the sum of its proper divisors (8169823).

2557056317 is an equidigital number, since it uses as much as digits as its factorization.

2557056317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8169822.

The product of its (nonzero) digits is 220500, while the sum is 41.

The square root of 2557056317 is about 50567.3443736172. The cubic root of 2557056317 is about 1367.4562200802.

The spelling of 2557056317 in words is "two billion, five hundred fifty-seven million, fifty-six thousand, three hundred seventeen".