231320 has 16 divisors (see below), whose sum is σ = 520560. Its totient is φ = 92512.

The previous prime is 231317. The next prime is 231323. The reversal of 231320 is 23132.

231320 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (231317) and next prime (231323).

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231323) 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, 2852 + ... + 2931.

It is an arithmetic number, because the mean of its divisors is an integer number (32535).

2²³¹³²⁰ is an apocalyptic number.

231320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231320 is an abundant number, since it is smaller than the sum of its proper divisors (289240).

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

231320 is a wasteful number, since it uses less digits than its factorization.

231320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5794 (or 5790 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 11.

The square root of 231320 is about 480.9573785690. The cubic root of 231320 is about 61.3862439873.

Adding to 231320 its reverse (23132), we get a palindrome (254452).

It can be divided in two parts, 231 and 320, that multiplied together give a triangular number (73920 = T₃₈₄).

The spelling of 231320 in words is "two hundred thirty-one thousand, three hundred twenty".