2291911 has 2 divisors, whose sum is σ = 2291912. Its totient is φ = 2291910.

The previous prime is 2291909. The next prime is 2291917. The reversal of 2291911 is 1191922.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2291911 - 2¹ = 2291909 is a prime.

Together with 2291909, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2291917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1145955 + 1145956.

It is an arithmetic number, because the mean of its divisors is an integer number (1145956).

2^2291911 is an apocalyptic number.

2291911 is a deficient number, since it is larger than the sum of its proper divisors (1).

2291911 is an equidigital number, since it uses as much as digits as its factorization.

2291911 is an evil number, because the sum of its binary digits is even.

The product of its digits is 324, while the sum is 25.

The square root of 2291911 is about 1513.9058755418. The cubic root of 2291911 is about 131.8456836071.

The spelling of 2291911 in words is "two million, two hundred ninety-one thousand, nine hundred eleven".