2291571 has 20 divisors (see below), whose sum is σ = 3605800. Its totient is φ = 1446336.

The previous prime is 2291567. The next prime is 2291573. The reversal of 2291571 is 1751922.

2291571 is a `hidden beast` number, since 2 + 2 + 91 + 571 = 666.

It is not a de Polignac number, because 2291571 - 2² = 2291567 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2291573) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 795 + ... + 2283.

It is an arithmetic number, because the mean of its divisors is an integer number (180290).

2^2291571 is an apocalyptic number.

2291571 is a deficient number, since it is larger than the sum of its proper divisors (1314229).

2291571 is a wasteful number, since it uses less digits than its factorization.

2291571 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1520 (or 1511 counting only the distinct ones).

The product of its digits is 1260, while the sum is 27.

The square root of 2291571 is about 1513.7935790589. The cubic root of 2291571 is about 131.8391636114.

The spelling of 2291571 in words is "two million, two hundred ninety-one thousand, five hundred seventy-one".