185231 has 4 divisors (see below), whose sum is σ = 195000. Its totient is φ = 175464.

The previous prime is 185221. The next prime is 185233. The reversal of 185231 is 132581.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 132581 = 197 ⋅673.

It is a cyclic number.

It is not a de Polignac number, because 185231 - 2⁶ = 185167 is a prime.

It is a super-2 number, since 2×185231² = 68621046722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (185233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4856 + ... + 4893.

It is an arithmetic number, because the mean of its divisors is an integer number (48750).

2¹⁸⁵²³¹ is an apocalyptic number.

185231 is a deficient number, since it is larger than the sum of its proper divisors (9769).

185231 is an equidigital number, since it uses as much as digits as its factorization.

185231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9768.

The product of its digits is 240, while the sum is 20.

The square root of 185231 is about 430.3847116244. The cubic root of 185231 is about 57.0038983689.

Subtracting from 185231 its reverse (132581), we obtain a triangular number (52650 = T₃₂₄).

The spelling of 185231 in words is "one hundred eighty-five thousand, two hundred thirty-one".