206342231 has 4 divisors (see below), whose sum is σ = 212998464. Its totient is φ = 199686000.

The previous prime is 206342207. The next prime is 206342239. The reversal of 206342231 is 132243602.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 132243602 = 2 ⋅66121801.

It is a cyclic number.

It is not a de Polignac number, because 206342231 - 2⁶ = 206342167 is a prime.

It is a super-2 number, since 2×206342231² = 85154232588114722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 206342197 and 206342206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206342239) 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, 3328070 + ... + 3328131.

It is an arithmetic number, because the mean of its divisors is an integer number (53249616).

Almost surely, 2^206342231 is an apocalyptic number.

206342231 is a deficient number, since it is larger than the sum of its proper divisors (6656233).

206342231 is an equidigital number, since it uses as much as digits as its factorization.

206342231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6656232.

The product of its (nonzero) digits is 1728, while the sum is 23.

The square root of 206342231 is about 14364.6173287004. The cubic root of 206342231 is about 590.9209317771.

Adding to 206342231 its reverse (132243602), we get a palindrome (338585833).

The spelling of 206342231 in words is "two hundred six million, three hundred forty-two thousand, two hundred thirty-one".