5581555 has 8 divisors (see below), whose sum is σ = 7654752. Its totient is φ = 3827328.

The previous prime is 5581553. The next prime is 5581591. The reversal of 5581555 is 5551855.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 5581555 - 2¹ = 5581553 is a prime.

5581555 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 5581555.

It is not an unprimeable number, because it can be changed into a prime (5581553) 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 7 ways as a sum of consecutive naturals, for example, 79702 + ... + 79771.

It is an arithmetic number, because the mean of its divisors is an integer number (956844).

Almost surely, 2^5581555 is an apocalyptic number.

5581555 is a deficient number, since it is larger than the sum of its proper divisors (2073197).

5581555 is a wasteful number, since it uses less digits than its factorization.

5581555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159485.

The product of its digits is 25000, while the sum is 34.

The square root of 5581555 is about 2362.5314812717. The cubic root of 5581555 is about 177.3856169759.

Subtracting from 5581555 its product of digits (25000), we obtain a palindrome (5556555).

The spelling of 5581555 in words is "five million, five hundred eighty-one thousand, five hundred fifty-five".