191355 has 8 divisors (see below), whose sum is σ = 306192. Its totient is φ = 102048.

The previous prime is 191353. The next prime is 191413. The reversal of 191355 is 553191.

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

It is not a de Polignac number, because 191355 - 2¹ = 191353 is a prime.

191355 is a lucky number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 191355.

It is not an unprimeable number, because it can be changed into a prime (191353) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6364 + ... + 6393.

It is an arithmetic number, because the mean of its divisors is an integer number (38274).

2¹⁹¹³⁵⁵ is an apocalyptic number.

191355 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

191355 is a deficient number, since it is larger than the sum of its proper divisors (114837).

191355 is a wasteful number, since it uses less digits than its factorization.

191355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12765.

The product of its digits is 675, while the sum is 24.

The square root of 191355 is about 437.4414246502. The cubic root of 191355 is about 57.6253095756.

The spelling of 191355 in words is "one hundred ninety-one thousand, three hundred fifty-five".