191955 has 16 divisors (see below), whose sum is σ = 313344. Its totient is φ = 100320.

The previous prime is 191953. The next prime is 191969. The reversal of 191955 is 559191.

It is not a de Polignac number, because 191955 - 2¹ = 191953 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (191953) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 910 + ... + 1100.

It is an arithmetic number, because the mean of its divisors is an integer number (19584).

2¹⁹¹⁹⁵⁵ is an apocalyptic number.

191955 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

191955 is a deficient number, since it is larger than the sum of its proper divisors (121389).

191955 is a wasteful number, since it uses less digits than its factorization.

191955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 266.

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

The square root of 191955 is about 438.1266940053. The cubic root of 191955 is about 57.6854754302.

Subtracting 191955 from its reverse (559191), we obtain a square (367236 = 606²).

The spelling of 191955 in words is "one hundred ninety-one thousand, nine hundred fifty-five".