230531 has 4 divisors (see below), whose sum is σ = 263472. Its totient is φ = 197592.

The previous prime is 230507. The next prime is 230539. The reversal of 230531 is 135032.

230531 is nontrivially palindromic in base 16.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 230531 - 2⁶ = 230467 is a prime.

It is a super-2 number, since 2×230531² = 106289083922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (230539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16460 + ... + 16473.

It is an arithmetic number, because the mean of its divisors is an integer number (65868).

2²³⁰⁵³¹ is an apocalyptic number.

230531 is a deficient number, since it is larger than the sum of its proper divisors (32941).

230531 is an equidigital number, since it uses as much as digits as its factorization.

230531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32940.

The product of its (nonzero) digits is 90, while the sum is 14.

The square root of 230531 is about 480.1364389421. The cubic root of 230531 is about 61.3163712021.

Adding to 230531 its reverse (135032), we get a palindrome (365563).

The spelling of 230531 in words is "two hundred thirty thousand, five hundred thirty-one".