5681831 has 4 divisors (see below), whose sum is σ = 5835432. Its totient is φ = 5528232.

The previous prime is 5681803. The next prime is 5681861. The reversal of 5681831 is 1381865.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1381865 = 5 ⋅276373.

It is a cyclic number.

It is not a de Polignac number, because 5681831 - 2¹⁴ = 5665447 is a prime.

It is a super-2 number, since 2×5681831² = 64566407025122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5681861) 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, 76745 + ... + 76818.

It is an arithmetic number, because the mean of its divisors is an integer number (1458858).

Almost surely, 2^5681831 is an apocalyptic number.

5681831 is a deficient number, since it is larger than the sum of its proper divisors (153601).

5681831 is a wasteful number, since it uses less digits than its factorization.

5681831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153600.

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

The square root of 5681831 is about 2383.6591618770. The cubic root of 5681831 is about 178.4415980638.

The spelling of 5681831 in words is "five million, six hundred eighty-one thousand, eight hundred thirty-one".