195831 has 8 divisors (see below), whose sum is σ = 290160. Its totient is φ = 130536.

The previous prime is 195817. The next prime is 195863. The reversal of 195831 is 138591.

It is not a de Polignac number, because 195831 - 2⁹ = 195319 is a prime.

It is a super-2 number, since 2×195831² = 76699561122, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 7253 = 195831 / (1 + 9 + 5 + 8 + 3 + 1).

It is a junction number, because it is equal to n+sod(n) for n = 195795 and 195804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (195131) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3600 + ... + 3653.

It is an arithmetic number, because the mean of its divisors is an integer number (36270).

2¹⁹⁵⁸³¹ is an apocalyptic number.

195831 is a deficient number, since it is larger than the sum of its proper divisors (94329).

195831 is an equidigital number, since it uses as much as digits as its factorization.

195831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7262 (or 7256 counting only the distinct ones).

The product of its digits is 1080, while the sum is 27.

The square root of 195831 is about 442.5279652180. The cubic root of 195831 is about 58.0711572153.

The spelling of 195831 in words is "one hundred ninety-five thousand, eight hundred thirty-one".