2559551 has 4 divisors (see below), whose sum is σ = 2588400. Its totient is φ = 2530704.

The previous prime is 2559541. The next prime is 2559553. The reversal of 2559551 is 1559552.

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

It is a cyclic number.

It is not a de Polignac number, because 2559551 - 2¹⁰ = 2558527 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 (2559553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14291 + ... + 14468.

It is an arithmetic number, because the mean of its divisors is an integer number (647100).

2^2559551 is an apocalyptic number.

2559551 is a deficient number, since it is larger than the sum of its proper divisors (28849).

2559551 is an equidigital number, since it uses as much as digits as its factorization.

2559551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28848.

The product of its digits is 11250, while the sum is 32.

The square root of 2559551 is about 1599.8596813471. The cubic root of 2559551 is about 136.7900775665.

Subtracting from 2559551 its reverse (1559552), we obtain a palindrome (999999).

The spelling of 2559551 in words is "two million, five hundred fifty-nine thousand, five hundred fifty-one".