230931 has 10 divisors (see below), whose sum is σ = 345092. Its totient is φ = 153900.

The previous prime is 230929. The next prime is 230933. The reversal of 230931 is 139032.

It is an interprime number because it is at equal distance from previous prime (230929) and next prime (230933).

It is not a de Polignac number, because 230931 - 2¹ = 230929 is a prime.

It is a super-2 number, since 2×230931² = 106658253522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (230933) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1345 + ... + 1506.

2²³⁰⁹³¹ is an apocalyptic number.

230931 is a deficient number, since it is larger than the sum of its proper divisors (114161).

230931 is an equidigital number, since it uses as much as digits as its factorization.

230931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2863 (or 2854 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 18.

The square root of 230931 is about 480.5528066716. The cubic root of 230931 is about 61.3518145577.

Adding to 230931 its reverse (139032), we get a palindrome (369963).

The spelling of 230931 in words is "two hundred thirty thousand, nine hundred thirty-one".