195381 has 12 divisors (see below), whose sum is σ = 299052. Its totient is φ = 122496.

The previous prime is 195359. The next prime is 195389. The reversal of 195381 is 183591.

It can be written as a sum of positive squares in 2 ways, for example, as 140625 + 54756 = 375^2 + 234^2 .

It is not a de Polignac number, because 195381 - 2⁷ = 195253 is a prime.

It is a super-2 number, since 2×195381² = 76347470322, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 195381.

It is not an unprimeable number, because it can be changed into a prime (195389) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 486 + ... + 791.

It is an arithmetic number, because the mean of its divisors is an integer number (24921).

2¹⁹⁵³⁸¹ is an apocalyptic number.

It is an amenable number.

195381 is a deficient number, since it is larger than the sum of its proper divisors (103671).

195381 is a wasteful number, since it uses less digits than its factorization.

195381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1300 (or 1297 counting only the distinct ones).

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

The square root of 195381 is about 442.0192303509. The cubic root of 195381 is about 58.0266425358.

It can be divided in two parts, 195 and 381, that added together give a square (576 = 24²).

The spelling of 195381 in words is "one hundred ninety-five thousand, three hundred eighty-one".