231307 has 4 divisors (see below), whose sum is σ = 232360. Its totient is φ = 230256.

The previous prime is 231299. The next prime is 231317. The reversal of 231307 is 703132.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 231307 - 2³ = 231299 is a prime.

It is an Ulam number.

It is a Duffinian number.

231307 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231317) 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, 57 + ... + 682.

It is an arithmetic number, because the mean of its divisors is an integer number (58090).

2²³¹³⁰⁷ is an apocalyptic number.

231307 is a deficient number, since it is larger than the sum of its proper divisors (1053).

231307 is an equidigital number, since it uses as much as digits as its factorization.

231307 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1052.

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

The square root of 231307 is about 480.9438636681. The cubic root of 231307 is about 61.3850940130.

Adding to 231307 its reverse (703132), we get a palindrome (934439).

The spelling of 231307 in words is "two hundred thirty-one thousand, three hundred seven".