5815381 has 12 divisors (see below), whose sum is σ = 6885676. Its totient is φ = 4878720.

The previous prime is 5815379. The next prime is 5815417. The reversal of 5815381 is 1835185.

It can be written as a sum of positive squares in 2 ways, for example, as 680625 + 5134756 = 825^2 + 2266^2 .

It is not a de Polignac number, because 5815381 - 2¹ = 5815379 is a prime.

It is a super-2 number, since 2×5815381² = 67637312350322, which contains 22 as substring.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5815331) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 276 + ... + 3421.

Almost surely, 2^5815381 is an apocalyptic number.

It is an amenable number.

5815381 is a deficient number, since it is larger than the sum of its proper divisors (1070295).

5815381 is a wasteful number, since it uses less digits than its factorization.

5815381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3732 (or 3721 counting only the distinct ones).

The product of its digits is 4800, while the sum is 31.

The square root of 5815381 is about 2411.5101077955. The cubic root of 5815381 is about 179.8288599691.

The spelling of 5815381 in words is "five million, eight hundred fifteen thousand, three hundred eighty-one".