2287191 has 4 divisors (see below), whose sum is σ = 3049592. Its totient is φ = 1524792.

The previous prime is 2287183. The next prime is 2287193. The reversal of 2287191 is 1917822.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 2287191 - 2³ = 2287183 is a prime.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2287193) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 381196 + ... + 381201.

It is an arithmetic number, because the mean of its divisors is an integer number (762398).

2^2287191 is an apocalyptic number.

2287191 is a deficient number, since it is larger than the sum of its proper divisors (762401).

2287191 is an equidigital number, since it uses as much as digits as its factorization.

2287191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 762400.

The product of its digits is 2016, while the sum is 30.

The square root of 2287191 is about 1512.3461905265. The cubic root of 2287191 is about 131.7551129994.

The spelling of 2287191 in words is "two million, two hundred eighty-seven thousand, one hundred ninety-one".