230021 has 6 divisors (see below), whose sum is σ = 252966. Its totient is φ = 209000.

The previous prime is 230017. The next prime is 230047. The reversal of 230021 is 120032.

It can be written as a sum of positive squares in only one way, i.e., 148225 + 81796 = 385^2 + 286^2 .

It is not a de Polignac number, because 230021 - 2² = 230017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 229990 and 230008.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (230081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 830 + ... + 1071.

It is an arithmetic number, because the mean of its divisors is an integer number (42161).

2²³⁰⁰²¹ is an apocalyptic number.

It is an amenable number.

230021 is a deficient number, since it is larger than the sum of its proper divisors (22945).

230021 is a wasteful number, since it uses less digits than its factorization.

230021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1923 (or 1912 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 8.

The square root of 230021 is about 479.6050458450. The cubic root of 230021 is about 61.2711214120.

Adding to 230021 its reverse (120032), we get a palindrome (350053).

The spelling of 230021 in words is "two hundred thirty thousand, twenty-one".