5551565 has 4 divisors (see below), whose sum is σ = 6661884. Its totient is φ = 4441248.

The previous prime is 5551531. The next prime is 5551583. The reversal of 5551565 is 5651555.

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 2920681 + 2630884 = 1709^2 + 1622^2 .

It is a cyclic number.

It is not a de Polignac number, because 5551565 - 2⁶ = 5551501 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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, 555152 + ... + 555161.

It is an arithmetic number, because the mean of its divisors is an integer number (1665471).

Almost surely, 2^5551565 is an apocalyptic number.

It is an amenable number.

5551565 is a deficient number, since it is larger than the sum of its proper divisors (1110319).

5551565 is a wasteful number, since it uses less digits than its factorization.

5551565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1110318.

The product of its digits is 18750, while the sum is 32.

The square root of 5551565 is about 2356.1759272177. The cubic root of 5551565 is about 177.0673453924.

It can be divided in two parts, 5551 and 565, that added together give a palindrome (6116).

The spelling of 5551565 in words is "five million, five hundred fifty-one thousand, five hundred sixty-five".