2550881 has 4 divisors (see below), whose sum is σ = 2564292. Its totient is φ = 2537472.

The previous prime is 2550871. The next prime is 2550887. The reversal of 2550881 is 1880552.

2550881 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in 2 ways, for example, as 819025 + 1731856 = 905^2 + 1316^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2550881 is a prime.

It is a super-2 number, since 2×2550881² = 13013987752322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2550887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6416 + ... + 6801.

It is an arithmetic number, because the mean of its divisors is an integer number (641073).

2^2550881 is an apocalyptic number.

It is an amenable number.

2550881 is a deficient number, since it is larger than the sum of its proper divisors (13411).

2550881 is a wasteful number, since it uses less digits than its factorization.

2550881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13410.

The product of its (nonzero) digits is 3200, while the sum is 29.

The square root of 2550881 is about 1597.1477702454. The cubic root of 2550881 is about 136.6354525845.

The spelling of 2550881 in words is "two million, five hundred fifty thousand, eight hundred eighty-one".