195591 has 8 divisors (see below), whose sum is σ = 284544. Its totient is φ = 118520.

The previous prime is 195581. The next prime is 195593.

195591 is nontrivially palindromic in base 10.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 195591 - 2⁶ = 195527 is a prime.

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 195591.

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 7 ways as a sum of consecutive naturals, for example, 2931 + ... + 2996.

It is an arithmetic number, because the mean of its divisors is an integer number (35568).

2¹⁹⁵⁵⁹¹ is an apocalyptic number.

195591 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

195591 is a deficient number, since it is larger than the sum of its proper divisors (88953).

195591 is a wasteful number, since it uses less digits than its factorization.

195591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5941.

The product of its digits is 2025, while the sum is 30.

The square root of 195591 is about 442.2567127812. The cubic root of 195591 is about 58.0474245494.

The spelling of 195591 in words is "one hundred ninety-five thousand, five hundred ninety-one".