230731 has 4 divisors (see below), whose sum is σ = 232200. Its totient is φ = 229264.

The previous prime is 230729. The next prime is 230743. The reversal of 230731 is 137032.

230731 is nontrivially palindromic in base 4.

230731 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 230731 - 2¹ = 230729 is a prime.

It is a super-2 number, since 2×230731² = 106473588722, which contains 22 as substring.

It is a Duffinian number.

230731 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (230761) 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, 466 + ... + 823.

It is an arithmetic number, because the mean of its divisors is an integer number (58050).

2²³⁰⁷³¹ is an apocalyptic number.

230731 is a deficient number, since it is larger than the sum of its proper divisors (1469).

230731 is a wasteful number, since it uses less digits than its factorization.

230731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1468.

The product of its (nonzero) digits is 126, while the sum is 16.

The square root of 230731 is about 480.3446679209. The cubic root of 230731 is about 61.3340980003.

Adding to 230731 its reverse (137032), we get a palindrome (367763).

It can be divided in two parts, 2307 and 31, that multiplied together give a palindrome (71517).

The spelling of 230731 in words is "two hundred thirty thousand, seven hundred thirty-one".