231206 has 4 divisors (see below), whose sum is σ = 346812. Its totient is φ = 115602.

The previous prime is 231197. The next prime is 231223. The reversal of 231206 is 602132.

231206 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

231206 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57800 + ... + 57803.

It is an arithmetic number, because the mean of its divisors is an integer number (86703).

2²³¹²⁰⁶ is an apocalyptic number.

231206 is a deficient number, since it is larger than the sum of its proper divisors (115606).

231206 is a wasteful number, since it uses less digits than its factorization.

231206 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115605.

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

The square root of 231206 is about 480.8388503439. The cubic root of 231206 is about 61.3761581297.

Adding to 231206 its reverse (602132), we get a palindrome (833338).

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

The spelling of 231206 in words is "two hundred thirty-one thousand, two hundred six".