2281891 has 2 divisors, whose sum is σ = 2281892. Its totient is φ = 2281890.

The previous prime is 2281883. The next prime is 2281913. The reversal of 2281891 is 1981822.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2281891 - 2³ = 2281883 is a prime.

2281891 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (2281831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1140945 + 1140946.

It is an arithmetic number, because the mean of its divisors is an integer number (1140946).

2^2281891 is an apocalyptic number.

2281891 is a deficient number, since it is larger than the sum of its proper divisors (1).

2281891 is an equidigital number, since it uses as much as digits as its factorization.

2281891 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2304, while the sum is 31.

The square root of 2281891 is about 1510.5929299451. The cubic root of 2281891 is about 131.6532643162.

The spelling of 2281891 in words is "two million, two hundred eighty-one thousand, eight hundred ninety-one".