2056181 has 4 divisors (see below), whose sum is σ = 2059200. Its totient is φ = 2053164.

The previous prime is 2056157. The next prime is 2056193. The reversal of 2056181 is 1816502.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, 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 2056181 - 2¹⁴ = 2039797 is a prime.

It is a super-3 number, since 3×2056181³ = 26079861458771333223, which contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2056111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50 + ... + 2028.

It is an arithmetic number, because the mean of its divisors is an integer number (514800).

2^2056181 is an apocalyptic number.

It is an amenable number.

2056181 is a deficient number, since it is larger than the sum of its proper divisors (3019).

2056181 is a wasteful number, since it uses less digits than its factorization.

2056181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3018.

The product of its (nonzero) digits is 480, while the sum is 23.

The square root of 2056181 is about 1433.9389805707. The cubic root of 2056181 is about 127.1609549147.

The spelling of 2056181 in words is "two million, fifty-six thousand, one hundred eighty-one".