230811 has 16 divisors (see below), whose sum is σ = 364800. Its totient is φ = 127008.

The previous prime is 230807. The next prime is 230819. The reversal of 230811 is 118032.

It is a happy number.

It is not a de Polignac number, because 230811 - 2² = 230807 is a prime.

It is an Ulam 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 15 ways as a sum of consecutive naturals, for example, 420 + ... + 798.

It is an arithmetic number, because the mean of its divisors is an integer number (22800).

2²³⁰⁸¹¹ is an apocalyptic number.

230811 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

230811 is a deficient number, since it is larger than the sum of its proper divisors (133989).

230811 is a wasteful number, since it uses less digits than its factorization.

230811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 418.

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 230811 is about 480.4279342420. The cubic root of 230811 is about 61.3411858514.

Adding to 230811 its reverse (118032), we get a palindrome (348843).

The spelling of 230811 in words is "two hundred thirty thousand, eight hundred eleven".