195543 has 6 divisors (see below), whose sum is σ = 282464. Its totient is φ = 130356.

The previous prime is 195541. The next prime is 195581. The reversal of 195543 is 345591.

It is not a de Polignac number, because 195543 - 2¹ = 195541 is a prime.

It is an Ulam number.

It is a Duffinian number.

195543 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (195541) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10855 + ... + 10872.

2¹⁹⁵⁵⁴³ is an apocalyptic number.

195543 is a deficient number, since it is larger than the sum of its proper divisors (86921).

195543 is a wasteful number, since it uses less digits than its factorization.

195543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21733 (or 21730 counting only the distinct ones).

The product of its digits is 2700, while the sum is 27.

The square root of 195543 is about 442.2024423270. The cubic root of 195543 is about 58.0426756868.

The spelling of 195543 in words is "one hundred ninety-five thousand, five hundred forty-three".