5581581 has 8 divisors (see below), whose sum is σ = 7682304. Its totient is φ = 3600960.

The previous prime is 5581553. The next prime is 5581591. The reversal of 5581581 is 1851855.

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

It is not a de Polignac number, because 5581581 - 2⁵ = 5581549 is a prime.

It is a super-2 number, since 2×5581581² = 62308092919122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5581531) 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 7 ways as a sum of consecutive naturals, for example, 29916 + ... + 30101.

It is an arithmetic number, because the mean of its divisors is an integer number (960288).

Almost surely, 2^5581581 is an apocalyptic number.

It is an amenable number.

5581581 is a deficient number, since it is larger than the sum of its proper divisors (2100723).

5581581 is a wasteful number, since it uses less digits than its factorization.

5581581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60051.

The product of its digits is 8000, while the sum is 33.

The square root of 5581581 is about 2362.5369838375. The cubic root of 5581581 is about 177.3858924081.

The spelling of 5581581 in words is "five million, five hundred eighty-one thousand, five hundred eighty-one".