231375 has 16 divisors (see below), whose sum is σ = 385632. Its totient is φ = 123200.

The previous prime is 231367. The next prime is 231379. The reversal of 231375 is 573132.

It is a happy number.

It is not a de Polignac number, because 231375 - 2³ = 231367 is a prime.

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 (231379) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 67 + ... + 683.

It is an arithmetic number, because the mean of its divisors is an integer number (24102).

2²³¹³⁷⁵ is an apocalyptic number.

231375 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

231375 is a deficient number, since it is larger than the sum of its proper divisors (154257).

231375 is an equidigital number, since it uses as much as digits as its factorization.

231375 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 635 (or 625 counting only the distinct ones).

The product of its digits is 630, while the sum is 21.

The square root of 231375 is about 481.0145527944. The cubic root of 231375 is about 61.3911087862.

It can be divided in two parts, 231 and 375, that added together give a palindrome (606).

The spelling of 231375 in words is "two hundred thirty-one thousand, three hundred seventy-five".