2556211 has 4 divisors (see below), whose sum is σ = 2921392. Its totient is φ = 2191032.

The previous prime is 2556193. The next prime is 2556217. The reversal of 2556211 is 1126552.

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 2556211 - 2⁵ = 2556179 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2556217) 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, 182580 + ... + 182593.

It is an arithmetic number, because the mean of its divisors is an integer number (730348).

2^2556211 is an apocalyptic number.

2556211 is a deficient number, since it is larger than the sum of its proper divisors (365181).

2556211 is an equidigital number, since it uses as much as digits as its factorization.

2556211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 365180.

The product of its digits is 600, while the sum is 22.

The square root of 2556211 is about 1598.8154990492. The cubic root of 2556211 is about 136.7305517965.

It can be divided in two parts, 25562 and 11, that multiplied together give a palindrome (281182).

The spelling of 2556211 in words is "two million, five hundred fifty-six thousand, two hundred eleven".