2279281 has 2 divisors, whose sum is σ = 2279282. Its totient is φ = 2279280.

The previous prime is 2279261. The next prime is 2279293. The reversal of 2279281 is 1829722.

2279281 is nontrivially palindromic in base 9.

2279281 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 can be written as a sum of positive squares in only one way, i.e., 1311025 + 968256 = 1145^2 + 984^2 .

It is a cyclic number.

It is not a de Polignac number, because 2279281 - 2⁷ = 2279153 is a prime.

It is a super-2 number, since 2×2279281² = 10390243753922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2279261) 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, 1139640 + 1139641.

It is an arithmetic number, because the mean of its divisors is an integer number (1139641).

2^2279281 is an apocalyptic number.

It is an amenable number.

2279281 is a deficient number, since it is larger than the sum of its proper divisors (1).

2279281 is an equidigital number, since it uses as much as digits as its factorization.

2279281 is an odious number, because the sum of its binary digits is odd.

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

The square root of 2279281 is about 1509.7287835900. The cubic root of 2279281 is about 131.6030506833.

The spelling of 2279281 in words is "two million, two hundred seventy-nine thousand, two hundred eighty-one".