2057191 has 4 divisors (see below), whose sum is σ = 2123584. Its totient is φ = 1990800.

The previous prime is 2057179. The next prime is 2057197. The reversal of 2057191 is 1917502.

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

It is a cyclic number.

It is not a de Polignac number, because 2057191 - 2⁹ = 2056679 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2057197) 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, 33150 + ... + 33211.

It is an arithmetic number, because the mean of its divisors is an integer number (530896).

2^2057191 is an apocalyptic number.

2057191 is a deficient number, since it is larger than the sum of its proper divisors (66393).

2057191 is an equidigital number, since it uses as much as digits as its factorization.

2057191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66392.

The product of its (nonzero) digits is 630, while the sum is 25.

The square root of 2057191 is about 1434.2911141048. The cubic root of 2057191 is about 127.1817720739.

It can be divided in two parts, 205 and 7191, that added together give a square (7396 = 86²).

The spelling of 2057191 in words is "two million, fifty-seven thousand, one hundred ninety-one".