191530 has 16 divisors (see below), whose sum is σ = 349920. Its totient is φ = 75472.

The previous prime is 191519. The next prime is 191531. The reversal of 191530 is 35191.

191530 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 191498 and 191507.

It is not an unprimeable number, because it can be changed into a prime (191531) 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, 981 + ... + 1159.

It is an arithmetic number, because the mean of its divisors is an integer number (21870).

2¹⁹¹⁵³⁰ is an apocalyptic number.

191530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

191530 is a deficient number, since it is larger than the sum of its proper divisors (158390).

191530 is a wasteful number, since it uses less digits than its factorization.

191530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 293.

The product of its (nonzero) digits is 135, while the sum is 19.

The square root of 191530 is about 437.6414057193. The cubic root of 191530 is about 57.6428709259.

The spelling of 191530 in words is "one hundred ninety-one thousand, five hundred thirty".