2291919 has 8 divisors (see below), whose sum is σ = 3492480. Its totient is φ = 1309656.

The previous prime is 2291917. The next prime is 2291921. The reversal of 2291919 is 9191922.

It is an interprime number because it is at equal distance from previous prime (2291917) and next prime (2291921).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2291919 - 2¹ = 2291917 is a prime.

It is a super-2 number, since 2×2291919² = 10505785405122, which contains 22 as substring.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

2291919 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 2291919.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2291911) 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 7 ways as a sum of consecutive naturals, for example, 54549 + ... + 54590.

It is an arithmetic number, because the mean of its divisors is an integer number (436560).

2^2291919 is an apocalyptic number.

2291919 is a deficient number, since it is larger than the sum of its proper divisors (1200561).

2291919 is a wasteful number, since it uses less digits than its factorization.

2291919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109149.

The product of its digits is 2916, while the sum is 33.

The square root of 2291919 is about 1513.9085177117. The cubic root of 2291919 is about 131.8458370110.

The spelling of 2291919 in words is "two million, two hundred ninety-one thousand, nine hundred nineteen".