195771 has 4 divisors (see below), whose sum is σ = 261032. Its totient is φ = 130512.

The previous prime is 195761. The next prime is 195781. The reversal of 195771 is 177591.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 177591 = 3 ⋅59197.

It is an interprime number because it is at equal distance from previous prime (195761) and next prime (195781).

It is not a de Polignac number, because 195771 - 2⁵ = 195739 is a prime.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (195731) 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, 32626 + ... + 32631.

It is an arithmetic number, because the mean of its divisors is an integer number (65258).

2¹⁹⁵⁷⁷¹ is an apocalyptic number.

195771 is a deficient number, since it is larger than the sum of its proper divisors (65261).

195771 is an equidigital number, since it uses as much as digits as its factorization.

195771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65260.

The product of its digits is 2205, while the sum is 30.

The square root of 195771 is about 442.4601676987. The cubic root of 195771 is about 58.0652258675.

The spelling of 195771 in words is "one hundred ninety-five thousand, seven hundred seventy-one".