230613521 has 2 divisors, whose sum is σ = 230613522. Its totient is φ = 230613520.

The previous prime is 230613499. The next prime is 230613599. The reversal of 230613521 is 125316032.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 225600400 + 5013121 = 15020^2 + 2239^2 .

It is a cyclic number.

It is not a de Polignac number, because 230613521 - 2⁶ = 230613457 is a prime.

It is not a weakly prime, because it can be changed into another prime (230613121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115306760 + 115306761.

It is an arithmetic number, because the mean of its divisors is an integer number (115306761).

Almost surely, 2^230613521 is an apocalyptic number.

It is an amenable number.

230613521 is a deficient number, since it is larger than the sum of its proper divisors (1).

230613521 is an equidigital number, since it uses as much as digits as its factorization.

230613521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 230613521 is about 15185.9646055165. The cubic root of 230613521 is about 613.2368660965.

Adding to 230613521 its reverse (125316032), we get a palindrome (355929553).

The spelling of 230613521 in words is "two hundred thirty million, six hundred thirteen thousand, five hundred twenty-one".