5816381 has 4 divisors (see below), whose sum is σ = 5833212. Its totient is φ = 5799552.

The previous prime is 5816347. The next prime is 5816387. The reversal of 5816381 is 1836185.

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 2149156 + 3667225 = 1466^2 + 1915^2 .

It is a cyclic number.

It is not a de Polignac number, because 5816381 - 2²² = 1622077 is a prime.

It is a super-2 number, since 2×5816381² = 67660575874322, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5816387) 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, 7886 + ... + 8591.

It is an arithmetic number, because the mean of its divisors is an integer number (1458303).

Almost surely, 2^5816381 is an apocalyptic number.

It is an amenable number.

5816381 is a deficient number, since it is larger than the sum of its proper divisors (16831).

5816381 is a wasteful number, since it uses less digits than its factorization.

5816381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16830.

The product of its digits is 5760, while the sum is 32.

The square root of 5816381 is about 2411.7174378438. The cubic root of 5816381 is about 179.8391670355.

The spelling of 5816381 in words is "five million, eight hundred sixteen thousand, three hundred eighty-one".