2555811 has 6 divisors (see below), whose sum is σ = 3691740. Its totient is φ = 1703868.

The previous prime is 2555809. The next prime is 2555837. The reversal of 2555811 is 1185552.

It is not a de Polignac number, because 2555811 - 2¹ = 2555809 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2555881) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 141981 + ... + 141998.

It is an arithmetic number, because the mean of its divisors is an integer number (615290).

2^2555811 is an apocalyptic number.

2555811 is a deficient number, since it is larger than the sum of its proper divisors (1135929).

2555811 is a wasteful number, since it uses less digits than its factorization.

2555811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 283985 (or 283982 counting only the distinct ones).

The product of its digits is 2000, while the sum is 27.

The square root of 2555811 is about 1598.6904015475. The cubic root of 2555811 is about 136.7234194857.

The spelling of 2555811 in words is "two million, five hundred fifty-five thousand, eight hundred eleven".