2256811 has 2 divisors, whose sum is σ = 2256812. Its totient is φ = 2256810.

The previous prime is 2256791. The next prime is 2256823. The reversal of 2256811 is 1186522.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2256811 - 2⁹ = 2256299 is a prime.

2256811 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (2256841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1128405 + 1128406.

It is an arithmetic number, because the mean of its divisors is an integer number (1128406).

2^2256811 is an apocalyptic number.

2256811 is a deficient number, since it is larger than the sum of its proper divisors (1).

2256811 is an equidigital number, since it uses as much as digits as its factorization.

2256811 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 960, while the sum is 25.

The square root of 2256811 is about 1502.2686177911. The cubic root of 2256811 is about 131.1691577748.

The spelling of 2256811 in words is "two million, two hundred fifty-six thousand, eight hundred eleven".