2555881 has 2 divisors, whose sum is σ = 2555882. Its totient is φ = 2555880.

The previous prime is 2555873. The next prime is 2555893. The reversal of 2555881 is 1885552.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2088025 + 467856 = 1445^2 + 684^2 .

It is a cyclic number.

It is not a de Polignac number, because 2555881 - 2³ = 2555873 is a prime.

It is a super-2 number, since 2×2555881² = 13065055372322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2555081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1277940 + 1277941.

It is an arithmetic number, because the mean of its divisors is an integer number (1277941).

2^2555881 is an apocalyptic number.

It is an amenable number.

2555881 is a deficient number, since it is larger than the sum of its proper divisors (1).

2555881 is an equidigital number, since it uses as much as digits as its factorization.

2555881 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16000, while the sum is 34.

The square root of 2555881 is about 1598.7122943169. The cubic root of 2555881 is about 136.7246676938.

The spelling of 2555881 in words is "two million, five hundred fifty-five thousand, eight hundred eighty-one".