2291171 has 4 divisors (see below), whose sum is σ = 2294232. Its totient is φ = 2288112.

The previous prime is 2291167. The next prime is 2291183. The reversal of 2291171 is 1711922.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 2291171 - 2² = 2291167 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2291131) 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, 431 + ... + 2183.

It is an arithmetic number, because the mean of its divisors is an integer number (573558).

2^2291171 is an apocalyptic number.

2291171 is a deficient number, since it is larger than the sum of its proper divisors (3061).

2291171 is a wasteful number, since it uses less digits than its factorization.

2291171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3060.

The product of its digits is 252, while the sum is 23.

The square root of 2291171 is about 1513.6614548835. The cubic root of 2291171 is about 131.8314922026.

The spelling of 2291171 in words is "two million, two hundred ninety-one thousand, one hundred seventy-one".