2056191 has 16 divisors (see below), whose sum is σ = 2859360. Its totient is φ = 1313280.

The previous prime is 2056157. The next prime is 2056193. The reversal of 2056191 is 1916502.

It is not a de Polignac number, because 2056191 - 2⁹ = 2055679 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2056193) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8865 + ... + 9093.

It is an arithmetic number, because the mean of its divisors is an integer number (178710).

2^2056191 is an apocalyptic number.

2056191 is a deficient number, since it is larger than the sum of its proper divisors (803169).

2056191 is a wasteful number, since it uses less digits than its factorization.

2056191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 346.

The product of its (nonzero) digits is 540, while the sum is 24.

The square root of 2056191 is about 1433.9424674651. The cubic root of 2056191 is about 127.1611610586.

The spelling of 2056191 in words is "two million, fifty-six thousand, one hundred ninety-one".