2681256251 has 2 divisors, whose sum is σ = 2681256252. Its totient is φ = 2681256250.

The previous prime is 2681256217. The next prime is 2681256289. The reversal of 2681256251 is 1526521862.

It is an a-pointer prime, because the next prime (2681256289) can be obtained adding 2681256251 to its sum of digits (38).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2681256251 - 2¹⁴ = 2681239867 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (2681253251) 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, 1340628125 + 1340628126.

It is an arithmetic number, because the mean of its divisors is an integer number (1340628126).

Almost surely, 2^2681256251 is an apocalyptic number.

2681256251 is a deficient number, since it is larger than the sum of its proper divisors (1).

2681256251 is an equidigital number, since it uses as much as digits as its factorization.

2681256251 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 57600, while the sum is 38.

The square root of 2681256251 is about 51780.8483032096. The cubic root of 2681256251 is about 1389.2469137999.

The spelling of 2681256251 in words is "two billion, six hundred eighty-one million, two hundred fifty-six thousand, two hundred fifty-one".