2556213 has 16 divisors (see below), whose sum is σ = 3773952. Its totient is φ = 1526000.

The previous prime is 2556193. The next prime is 2556217. The reversal of 2556213 is 3126552.

It is a cyclic number.

It is not a de Polignac number, because 2556213 - 2⁶ = 2556149 is a prime.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

2556213 is a lucky number.

It is a congruent 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 15 ways as a sum of consecutive naturals, for example, 1798 + ... + 2888.

It is an arithmetic number, because the mean of its divisors is an integer number (235872).

2^2556213 is an apocalyptic number.

It is an amenable number.

2556213 is a deficient number, since it is larger than the sum of its proper divisors (1217739).

2556213 is a wasteful number, since it uses less digits than its factorization.

2556213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1176.

The product of its digits is 1800, while the sum is 24.

The square root of 2556213 is about 1598.8161245121. The cubic root of 2556213 is about 136.7305874561.

The spelling of 2556213 in words is "two million, five hundred fifty-six thousand, two hundred thirteen".