5581439 has 4 divisors (see below), whose sum is σ = 5673000. Its totient is φ = 5489880.

The previous prime is 5581403. The next prime is 5581447. The reversal of 5581439 is 9341855.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9341855 = 5 ⋅1868371.

It is a cyclic number.

It is not a de Polignac number, because 5581439 - 2¹⁶ = 5515903 is a prime.

It is a super-2 number, since 2×5581439² = 62304922621442, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 5581399 and 5581408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5581469) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45689 + ... + 45810.

It is an arithmetic number, because the mean of its divisors is an integer number (1418250).

Almost surely, 2^5581439 is an apocalyptic number.

5581439 is a deficient number, since it is larger than the sum of its proper divisors (91561).

5581439 is an equidigital number, since it uses as much as digits as its factorization.

5581439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91560.

The product of its digits is 21600, while the sum is 35.

The square root of 5581439 is about 2362.5069312068. The cubic root of 5581439 is about 177.3843881145.

The spelling of 5581439 in words is "five million, five hundred eighty-one thousand, four hundred thirty-nine".