195531 has 8 divisors (see below), whose sum is σ = 297984. Its totient is φ = 111720.

The previous prime is 195527. The next prime is 195539. The reversal of 195531 is 135591.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 195531 - 2² = 195527 is a prime.

It is a super-2 number, since 2×195531² = 76464743922, which contains 22 as substring.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 195531.

It is not an unprimeable number, because it can be changed into a prime (195539) 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 7 ways as a sum of consecutive naturals, for example, 4635 + ... + 4676.

It is an arithmetic number, because the mean of its divisors is an integer number (37248).

2¹⁹⁵⁵³¹ is an apocalyptic number.

195531 is a deficient number, since it is larger than the sum of its proper divisors (102453).

195531 is an equidigital number, since it uses as much as digits as its factorization.

195531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9321.

The product of its digits is 675, while the sum is 24.

The square root of 195531 is about 442.1888736728. The cubic root of 195531 is about 58.0414883497.

The spelling of 195531 in words is "one hundred ninety-five thousand, five hundred thirty-one".