2278291 has 2 divisors, whose sum is σ = 2278292. Its totient is φ = 2278290.

The previous prime is 2278277. The next prime is 2278301. The reversal of 2278291 is 1928722.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2278291 - 2⁵ = 2278259 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2278261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1139145 + 1139146.

It is an arithmetic number, because the mean of its divisors is an integer number (1139146).

2^2278291 is an apocalyptic number.

2278291 is a deficient number, since it is larger than the sum of its proper divisors (1).

2278291 is an equidigital number, since it uses as much as digits as its factorization.

2278291 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4032, while the sum is 31.

The square root of 2278291 is about 1509.4008745194. The cubic root of 2278291 is about 131.5839941054.

The spelling of 2278291 in words is "two million, two hundred seventy-eight thousand, two hundred ninety-one".