5815881 has 20 divisors (see below), whose sum is σ = 9147600. Its totient is φ = 3672216.

The previous prime is 5815867. The next prime is 5815903. The reversal of 5815881 is 1885185.

It is not a de Polignac number, because 5815881 - 2⁷ = 5815753 is a prime.

It is a super-2 number, since 2×5815881² = 67648943612322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (5815811) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 351 + ... + 3428.

It is an arithmetic number, because the mean of its divisors is an integer number (457380).

Almost surely, 2^5815881 is an apocalyptic number.

It is an amenable number.

5815881 is a deficient number, since it is larger than the sum of its proper divisors (3331719).

5815881 is a wasteful number, since it uses less digits than its factorization.

5815881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3810 (or 3801 counting only the distinct ones).

The product of its digits is 12800, while the sum is 36.

The square root of 5815881 is about 2411.6137750477. The cubic root of 5815881 is about 179.8340136500.

The spelling of 5815881 in words is "five million, eight hundred fifteen thousand, eight hundred eighty-one".