2278811 has 2 divisors, whose sum is σ = 2278812. Its totient is φ = 2278810.

The previous prime is 2278807. The next prime is 2278813. The reversal of 2278811 is 1188722.

2278811 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2278811 - 2² = 2278807 is a prime.

Together with 2278813, 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 (2278813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1139405 + 1139406.

It is an arithmetic number, because the mean of its divisors is an integer number (1139406).

2^2278811 is an apocalyptic number.

2278811 is a deficient number, since it is larger than the sum of its proper divisors (1).

2278811 is an equidigital number, since it uses as much as digits as its factorization.

2278811 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1792, while the sum is 29.

The square root of 2278811 is about 1509.5731184676. The cubic root of 2278811 is about 131.5940043092.

The spelling of 2278811 in words is "two million, two hundred seventy-eight thousand, eight hundred eleven".