195305 has 16 divisors (see below), whose sum is σ = 264384. Its totient is φ = 137280.

The previous prime is 195281. The next prime is 195311. The reversal of 195305 is 503591.

Added to its reverse (503591) it gives a square (698896 = 836²).

195305 = T₂₇₇ + T₂₇₈ + ... + T₂₈₁.

It is not a de Polignac number, because 195305 - 2⁶ = 195241 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 5.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2882 + ... + 2948.

It is an arithmetic number, because the mean of its divisors is an integer number (16524).

2¹⁹⁵³⁰⁵ is an apocalyptic number.

It is an amenable number.

195305 is a deficient number, since it is larger than the sum of its proper divisors (69079).

195305 is a wasteful number, since it uses less digits than its factorization.

195305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136.

The product of its (nonzero) digits is 675, while the sum is 23.

The square root of 195305 is about 441.9332528788. The cubic root of 195305 is about 58.0191177564.

Adding to 195305 its reverse (503591), we get a palindrome (698896).

The spelling of 195305 in words is "one hundred ninety-five thousand, three hundred five".