2553551 has 16 divisors (see below), whose sum is σ = 3429888. Its totient is φ = 1836000.

The previous prime is 2553547. The next prime is 2553559. The reversal of 2553551 is 1553552.

It is a cyclic number.

It is not a de Polignac number, because 2553551 - 2² = 2553547 is a prime.

It is a Smith number, since the sum of its digits (26) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 2553551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2553559) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 275 + ... + 2276.

It is an arithmetic number, because the mean of its divisors is an integer number (214368).

2^2553551 is an apocalyptic number.

2553551 is a deficient number, since it is larger than the sum of its proper divisors (876337).

2553551 is a wasteful number, since it uses less digits than its factorization.

2553551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2582.

The product of its digits is 3750, while the sum is 26.

The square root of 2553551 is about 1597.9834166849. The cubic root of 2553551 is about 136.6831079433.

Subtracting from 2553551 its reverse (1553552), we obtain a palindrome (999999).

The spelling of 2553551 in words is "two million, five hundred fifty-three thousand, five hundred fifty-one".