206231 has 4 divisors (see below), whose sum is σ = 207264. Its totient is φ = 205200.

The previous prime is 206221. The next prime is 206233. The reversal of 206231 is 132602.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 132602 = 2 ⋅66301.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-206231 is a prime.

It is a super-2 number, since 2×206231² = 85062450722, which contains 22 as substring.

It is a Duffinian number.

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 206231.

It is not an unprimeable number, because it can be changed into a prime (206233) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 110 + ... + 651.

It is an arithmetic number, because the mean of its divisors is an integer number (51816).

2²⁰⁶²³¹ is an apocalyptic number.

206231 is a deficient number, since it is larger than the sum of its proper divisors (1033).

206231 is an equidigital number, since it uses as much as digits as its factorization.

206231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1032.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 206231 is about 454.1266343213. The cubic root of 206231 is about 59.0814731930.

Adding to 206231 its reverse (132602), we get a palindrome (338833).

It can be divided in two parts, 206 and 231, that multiplied together give a triangular number (47586 = T₃₀₈).

The spelling of 206231 in words is "two hundred six thousand, two hundred thirty-one".