2556311 has 4 divisors (see below), whose sum is σ = 2560392. Its totient is φ = 2552232.

The previous prime is 2556277. The next prime is 2556331. The reversal of 2556311 is 1136552.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2556311 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2556331) 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, 881 + ... + 2426.

It is an arithmetic number, because the mean of its divisors is an integer number (640098).

2^2556311 is an apocalyptic number.

2556311 is a deficient number, since it is larger than the sum of its proper divisors (4081).

2556311 is an equidigital number, since it uses as much as digits as its factorization.

2556311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4080.

The product of its digits is 900, while the sum is 23.

The square root of 2556311 is about 1598.8467718953. The cubic root of 2556311 is about 136.7323347579.

The spelling of 2556311 in words is "two million, five hundred fifty-six thousand, three hundred eleven".