230813 has 4 divisors (see below), whose sum is σ = 251808. Its totient is φ = 209820.

The previous prime is 230807. The next prime is 230819. The reversal of 230813 is 318032.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (230807) and next prime (230819).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-230813 is a prime.

It is a super-3 number, since 3×230813³ = 36889439117933391, which contains 333 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 230791 and 230800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (230819) 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, 10481 + ... + 10502.

It is an arithmetic number, because the mean of its divisors is an integer number (62952).

2²³⁰⁸¹³ is an apocalyptic number.

It is an amenable number.

230813 is a deficient number, since it is larger than the sum of its proper divisors (20995).

230813 is a wasteful number, since it uses less digits than its factorization.

230813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20994.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 230813 is about 480.4300157151. The cubic root of 230813 is about 61.3413630266.

Adding to 230813 its reverse (318032), we get a palindrome (548845).

The spelling of 230813 in words is "two hundred thirty thousand, eight hundred thirteen".