231328 has 12 divisors (see below), whose sum is σ = 455490. Its totient is φ = 115648.

The previous prime is 231323. The next prime is 231331. The reversal of 231328 is 823132.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 121104 + 110224 = 348^2 + 332^2 .

It is a plaindrome in base 11.

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 as a sum of consecutive naturals, namely, 3583 + ... + 3646.

2²³¹³²⁸ is an apocalyptic number.

It is an amenable number.

231328 is a deficient number, since it is larger than the sum of its proper divisors (224162).

231328 is an equidigital number, since it uses as much as digits as its factorization.

231328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7239 (or 7231 counting only the distinct ones).

The product of its digits is 288, while the sum is 19.

The square root of 231328 is about 480.9656952424. The cubic root of 231328 is about 61.3869516423.

The spelling of 231328 in words is "two hundred thirty-one thousand, three hundred twenty-eight".