2291765 has 8 divisors (see below), whose sum is σ = 3143040. Its totient is φ = 1571472.

The previous prime is 2291749. The next prime is 2291797. The reversal of 2291765 is 5671922.

2291765 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 2291765 - 2⁴ = 2291749 is a prime.

It is a super-3 number, since 3×2291765³ = 36110333749782366375, which contains 333 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 32705 + ... + 32774.

It is an arithmetic number, because the mean of its divisors is an integer number (392880).

2^2291765 is an apocalyptic number.

It is an amenable number.

2291765 is a deficient number, since it is larger than the sum of its proper divisors (851275).

2291765 is an equidigital number, since it uses as much as digits as its factorization.

2291765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65491.

The product of its digits is 7560, while the sum is 32.

The square root of 2291765 is about 1513.8576551314. The cubic root of 2291765 is about 131.8428839232.

The spelling of 2291765 in words is "two million, two hundred ninety-one thousand, seven hundred sixty-five".