5931581 has 4 divisors (see below), whose sum is σ = 6091932. Its totient is φ = 5771232.

The previous prime is 5931559. The next prime is 5931637. The reversal of 5931581 is 1851395.

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 5428900 + 502681 = 2330^2 + 709^2 .

It is a cyclic number.

It is not a de Polignac number, because 5931581 - 2⁶ = 5931517 is a prime.

It is a super-2 number, since 2×5931581² = 70367306319122, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5933581) 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 3 ways as a sum of consecutive naturals, for example, 80120 + ... + 80193.

It is an arithmetic number, because the mean of its divisors is an integer number (1522983).

Almost surely, 2^5931581 is an apocalyptic number.

It is an amenable number.

5931581 is a deficient number, since it is larger than the sum of its proper divisors (160351).

5931581 is a wasteful number, since it uses less digits than its factorization.

5931581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160350.

The product of its digits is 5400, while the sum is 32.

The square root of 5931581 is about 2435.4837301859. The cubic root of 5931581 is about 181.0187195112.

The spelling of 5931581 in words is "five million, nine hundred thirty-one thousand, five hundred eighty-one".