231306 has 16 divisors (see below), whose sum is σ = 487200. Its totient is φ = 73008.

The previous prime is 231299. The next prime is 231317. The reversal of 231306 is 603132.

231306 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 901 + ... + 1128.

It is an arithmetic number, because the mean of its divisors is an integer number (30450).

2²³¹³⁰⁶ is an apocalyptic number.

231306 is an abundant number, since it is smaller than the sum of its proper divisors (255894).

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

231306 is a wasteful number, since it uses less digits than its factorization.

231306 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2053.

The product of its (nonzero) digits is 108, while the sum is 15.

The square root of 231306 is about 480.9428240446. The cubic root of 231306 is about 61.3850055517.

Adding to 231306 its reverse (603132), we get a palindrome (834438).

The spelling of 231306 in words is "two hundred thirty-one thousand, three hundred six".