195571 has 4 divisors (see below), whose sum is σ = 196672. Its totient is φ = 194472.

The previous prime is 195541. The next prime is 195581. The reversal of 195571 is 175591.

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.

It is a cyclic number.

It is not a de Polignac number, because 195571 - 2⁵ = 195539 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (195511) 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, 216 + ... + 661.

It is an arithmetic number, because the mean of its divisors is an integer number (49168).

2¹⁹⁵⁵⁷¹ is an apocalyptic number.

195571 is a deficient number, since it is larger than the sum of its proper divisors (1101).

195571 is an equidigital number, since it uses as much as digits as its factorization.

195571 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1100.

The product of its digits is 1575, while the sum is 28.

The square root of 195571 is about 442.2341009013. The cubic root of 195571 is about 58.0454459510.

The spelling of 195571 in words is "one hundred ninety-five thousand, five hundred seventy-one".