163831 has 4 divisors (see below), whose sum is σ = 164952. Its totient is φ = 162712.

The previous prime is 163819. The next prime is 163841. The reversal of 163831 is 138361.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 138361 = 83 ⋅1667.

It is a cyclic number.

It is not a de Polignac number, because 163831 - 2¹¹ = 161783 is a prime.

It is a super-2 number, since 2×163831² = 53681193122, 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 (163811) 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, 301 + ... + 646.

It is an arithmetic number, because the mean of its divisors is an integer number (41238).

2¹⁶³⁸³¹ is an apocalyptic number.

163831 is a deficient number, since it is larger than the sum of its proper divisors (1121).

163831 is an equidigital number, since it uses as much as digits as its factorization.

163831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1120.

The product of its digits is 432, while the sum is 22.

The square root of 163831 is about 404.7604229665. The cubic root of 163831 is about 54.7182283363.

It can be divided in two parts, 16383 and 1, that added together give a 14-th power (16384 = 2¹⁴).

The spelling of 163831 in words is "one hundred sixty-three thousand, eight hundred thirty-one".