5581231 has 4 divisors (see below), whose sum is σ = 5875000. Its totient is φ = 5287464.

The previous prime is 5581229. The next prime is 5581259. The reversal of 5581231 is 1321855.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1321855 = 5 ⋅264371.

It is a cyclic number.

It is not a de Polignac number, because 5581231 - 2¹ = 5581229 is a prime.

It is a super-2 number, since 2×5581231² = 62300278950722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 5581196 and 5581205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5581201) 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 3 ways as a sum of consecutive naturals, for example, 146856 + ... + 146893.

It is an arithmetic number, because the mean of its divisors is an integer number (1468750).

Almost surely, 2^5581231 is an apocalyptic number.

5581231 is a deficient number, since it is larger than the sum of its proper divisors (293769).

5581231 is a wasteful number, since it uses less digits than its factorization.

5581231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 293768.

The product of its digits is 1200, while the sum is 25.

The square root of 5581231 is about 2362.4629097618. The cubic root of 5581231 is about 177.3821845960.

The spelling of 5581231 in words is "five million, five hundred eighty-one thousand, two hundred thirty-one".