2256191867 has 2 divisors, whose sum is σ = 2256191868. Its totient is φ = 2256191866.

The previous prime is 2256191849. The next prime is 2256191881. The reversal of 2256191867 is 7681916522.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2256191867 - 2¹⁴ = 2256175483 is a prime.

It is not a weakly prime, because it can be changed into another prime (2256191887) 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, 1128095933 + 1128095934.

It is an arithmetic number, because the mean of its divisors is an integer number (1128095934).

Almost surely, 2^2256191867 is an apocalyptic number.

2256191867 is a deficient number, since it is larger than the sum of its proper divisors (1).

2256191867 is an equidigital number, since it uses as much as digits as its factorization.

2256191867 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 362880, while the sum is 47.

The square root of 2256191867 is about 47499.3880697425. The cubic root of 2256191867 is about 1311.5716170573.

The spelling of 2256191867 in words is "two billion, two hundred fifty-six million, one hundred ninety-one thousand, eight hundred sixty-seven".