230511 has 4 divisors (see below), whose sum is σ = 307352. Its totient is φ = 153672.

The previous prime is 230507. The next prime is 230539. The reversal of 230511 is 115032.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 230511 - 2² = 230507 is a prime.

It is a super-2 number, since 2×230511² = 106270642242, which contains 22 as substring.

It is an Ulam number.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 230511.

It is not an unprimeable number, because it can be changed into a prime (230501) 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, 38416 + ... + 38421.

It is an arithmetic number, because the mean of its divisors is an integer number (76838).

2²³⁰⁵¹¹ is an apocalyptic number.

230511 is a deficient number, since it is larger than the sum of its proper divisors (76841).

230511 is an equidigital number, since it uses as much as digits as its factorization.

230511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76840.

The product of its (nonzero) digits is 30, while the sum is 12.

The square root of 230511 is about 480.1156110772. The cubic root of 230511 is about 61.3145979585.

Adding to 230511 its reverse (115032), we get a palindrome (345543).

It can be divided in two parts, 230 and 511, that added together give a triangular number (741 = T₃₈).

The spelling of 230511 in words is "two hundred thirty thousand, five hundred eleven".