2557704731 has 2 divisors, whose sum is σ = 2557704732. Its totient is φ = 2557704730.

The previous prime is 2557704701. The next prime is 2557704733. The reversal of 2557704731 is 1374077552.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2557704731 is a prime.

It is a super-2 number, since 2×2557704731² = 13083706981959564722, which contains 22 as substring.

Together with 2557704733, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2557704733) 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, 1278852365 + 1278852366.

It is an arithmetic number, because the mean of its divisors is an integer number (1278852366).

Almost surely, 2^2557704731 is an apocalyptic number.

2557704731 is a deficient number, since it is larger than the sum of its proper divisors (1).

2557704731 is an equidigital number, since it uses as much as digits as its factorization.

2557704731 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 205800, while the sum is 41.

The square root of 2557704731 is about 50573.7553578929. The cubic root of 2557704731 is about 1367.5717960538.

The spelling of 2557704731 in words is "two billion, five hundred fifty-seven million, seven hundred four thousand, seven hundred thirty-one".