195563 has 4 divisors (see below), whose sum is σ = 196560. Its totient is φ = 194568.

The previous prime is 195541. The next prime is 195581. The reversal of 195563 is 365591.

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 195563 - 2¹² = 191467 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (195593) 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, 95 + ... + 632.

It is an arithmetic number, because the mean of its divisors is an integer number (49140).

2¹⁹⁵⁵⁶³ is an apocalyptic number.

195563 is a deficient number, since it is larger than the sum of its proper divisors (997).

195563 is an equidigital number, since it uses as much as digits as its factorization.

195563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 996.

The product of its digits is 4050, while the sum is 29.

The square root of 195563 is about 442.2250558257. The cubic root of 195563 is about 58.0446544740.

The spelling of 195563 in words is "one hundred ninety-five thousand, five hundred sixty-three".