2550561 has 16 divisors (see below), whose sum is σ = 3878784. Its totient is φ = 1476864.

The previous prime is 2550551. The next prime is 2550563. The reversal of 2550561 is 1650552.

2550561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2550561 - 2⁶ = 2550497 is a prime.

It is a super-2 number, since 2×2550561² = 13010722829442, which contains 22 as substring.

2550561 is a modest number, since divided by 561 gives 255 as remainder.

It is not an unprimeable number, because it can be changed into a prime (2550563) 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 15 ways as a sum of consecutive naturals, for example, 1261 + ... + 2586.

It is an arithmetic number, because the mean of its divisors is an integer number (242424).

2^2550561 is an apocalyptic number.

It is an amenable number.

2550561 is a deficient number, since it is larger than the sum of its proper divisors (1328223).

2550561 is a wasteful number, since it uses less digits than its factorization.

2550561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3880.

The product of its (nonzero) digits is 1500, while the sum is 24.

The square root of 2550561 is about 1597.0475885208. The cubic root of 2550561 is about 136.6297388496.

Subtracting from 2550561 its reverse (1650552), we obtain a palindrome (900009).

The spelling of 2550561 in words is "two million, five hundred fifty thousand, five hundred sixty-one".