231606 has 16 divisors (see below), whose sum is σ = 514800. Its totient is φ = 77184.

The previous prime is 231599. The next prime is 231607. The reversal of 231606 is 606132.

It is a happy number.

231606 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231607) 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, 2091 + ... + 2198.

It is an arithmetic number, because the mean of its divisors is an integer number (32175).

2²³¹⁶⁰⁶ is an apocalyptic number.

231606 is an abundant number, since it is smaller than the sum of its proper divisors (283194).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

231606 is a wasteful number, since it uses less digits than its factorization.

231606 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4300 (or 4294 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 231606 is about 481.2546103675. The cubic root of 231606 is about 61.4115325273.

Adding to 231606 its reverse (606132), we get a palindrome (837738).

The spelling of 231606 in words is "two hundred thirty-one thousand, six hundred six".