2291219 has 4 divisors (see below), whose sum is σ = 2618544. Its totient is φ = 1963896.

The previous prime is 2291213. The next prime is 2291227. The reversal of 2291219 is 9121922.

It is a happy number.

2291219 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9121922 = 2 ⋅4560961.

It is a cyclic number.

It is not a de Polignac number, because 2291219 - 2¹⁶ = 2225683 is a prime.

It is a super-2 number, since 2×2291219² = 10499369011922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2291213) 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 in 3 ways as a sum of consecutive naturals, for example, 163652 + ... + 163665.

It is an arithmetic number, because the mean of its divisors is an integer number (654636).

2^2291219 is an apocalyptic number.

2291219 is a deficient number, since it is larger than the sum of its proper divisors (327325).

2291219 is an equidigital number, since it uses as much as digits as its factorization.

2291219 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 327324.

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

The square root of 2291219 is about 1513.6773103935. The cubic root of 2291219 is about 131.8324128188.

The spelling of 2291219 in words is "two million, two hundred ninety-one thousand, two hundred nineteen".