36831 has 4 divisors (see below), whose sum is σ = 49112. Its totient is φ = 24552.

The previous prime is 36821. The next prime is 36833. The reversal of 36831 is 13863.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13863 = 3 ⋅4621.

It is not a de Polignac number, because 36831 - 2⁶ = 36767 is a prime.

It is a super-2 number, since 2×36831² = 2713045122, which contains 22 as substring.

It is an Ulam number.

It is a D-number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 36798 and 36807.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 36831.

It is not an unprimeable number, because it can be changed into a prime (36833) 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, 6136 + ... + 6141.

It is an arithmetic number, because the mean of its divisors is an integer number (12278).

2³⁶⁸³¹ is an apocalyptic number.

36831 is a deficient number, since it is larger than the sum of its proper divisors (12281).

36831 is a wasteful number, since it uses less digits than its factorization.

36831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12280.

The product of its digits is 432, while the sum is 21.

The square root of 36831 is about 191.9140432590. The cubic root of 36831 is about 33.2714072483.

The spelling of 36831 in words is "thirty-six thousand, eight hundred thirty-one".