2291851 has 2 divisors, whose sum is σ = 2291852. Its totient is φ = 2291850.

The previous prime is 2291827. The next prime is 2291867. The reversal of 2291851 is 1581922.

2291851 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 2291851 - 2¹¹ = 2289803 is a prime.

It is not a weakly prime, because it can be changed into another prime (2291801) 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, 1145925 + 1145926.

It is an arithmetic number, because the mean of its divisors is an integer number (1145926).

2^2291851 is an apocalyptic number.

2291851 is a deficient number, since it is larger than the sum of its proper divisors (1).

2291851 is an equidigital number, since it uses as much as digits as its factorization.

2291851 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1440, while the sum is 28.

The square root of 2291851 is about 1513.8860591207. The cubic root of 2291851 is about 131.8445330665.

It can be divided in two parts, 229 and 1851, that added together give a triangular number (2080 = T₆₄).

The spelling of 2291851 in words is "two million, two hundred ninety-one thousand, eight hundred fifty-one".