195181 has 4 divisors (see below), whose sum is σ = 223072. Its totient is φ = 167292.

The previous prime is 195163. The next prime is 195193. The reversal of 195181 is 181591.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 181591 = 113 ⋅1607.

It is a cyclic number.

It is not a de Polignac number, because 195181 - 2⁷ = 195053 is a prime.

It is a super-2 number, since 2×195181² = 76191245522, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (195121) 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, 13935 + ... + 13948.

It is an arithmetic number, because the mean of its divisors is an integer number (55768).

2¹⁹⁵¹⁸¹ is an apocalyptic number.

It is an amenable number.

195181 is a deficient number, since it is larger than the sum of its proper divisors (27891).

195181 is an equidigital number, since it uses as much as digits as its factorization.

195181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27890.

The product of its digits is 360, while the sum is 25.

The square root of 195181 is about 441.7929379245. The cubic root of 195181 is about 58.0068362929.

The spelling of 195181 in words is "one hundred ninety-five thousand, one hundred eighty-one".