230005521 has 8 divisors (see below), whose sum is σ = 340748960. Its totient is φ = 153336996.

The previous prime is 230005453. The next prime is 230005547. The reversal of 230005521 is 125500032.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-230005521 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 230005494 and 230005503.

It is not an unprimeable number, because it can be changed into a prime (230005571) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4259335 + ... + 4259388.

It is an arithmetic number, because the mean of its divisors is an integer number (42593620).

Almost surely, 2^230005521 is an apocalyptic number.

It is an amenable number.

230005521 is a deficient number, since it is larger than the sum of its proper divisors (110743439).

230005521 is an equidigital number, since it uses as much as digits as its factorization.

230005521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8518732 (or 8518726 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 18.

The square root of 230005521 is about 15165.9329089905. The cubic root of 230005521 is about 612.6974699121.

Adding to 230005521 its reverse (125500032), we get a palindrome (355505553).

The spelling of 230005521 in words is "two hundred thirty million, five thousand, five hundred twenty-one".