2291291 has 4 divisors (see below), whose sum is σ = 2305512. Its totient is φ = 2277072.

The previous prime is 2291287. The next prime is 2291327. The reversal of 2291291 is 1921922.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1921922 = 2 ⋅960961.

It is a cyclic number.

It is not a de Polignac number, because 2291291 - 2² = 2291287 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2291291.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2291231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6866 + ... + 7191.

It is an arithmetic number, because the mean of its divisors is an integer number (576378).

2^2291291 is an apocalyptic number.

2291291 is a deficient number, since it is larger than the sum of its proper divisors (14221).

2291291 is a wasteful number, since it uses less digits than its factorization.

2291291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14220.

The product of its digits is 648, while the sum is 26.

The square root of 2291291 is about 1513.7010933470. The cubic root of 2291291 is about 131.8337937190.

The spelling of 2291291 in words is "two million, two hundred ninety-one thousand, two hundred ninety-one".