230245721 has 2 divisors, whose sum is σ = 230245722. Its totient is φ = 230245720.

The previous prime is 230245661. The next prime is 230245747. The reversal of 230245721 is 127542032.

It is an a-pointer prime, because the next prime (230245747) can be obtained adding 230245721 to its sum of digits (26).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 226201600 + 4044121 = 15040^2 + 2011^2 .

It is a cyclic number.

It is not a de Polignac number, because 230245721 - 2⁶ = 230245657 is a prime.

It is not a weakly prime, because it can be changed into another prime (230245751) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115122860 + 115122861.

It is an arithmetic number, because the mean of its divisors is an integer number (115122861).

Almost surely, 2^230245721 is an apocalyptic number.

It is an amenable number.

230245721 is a deficient number, since it is larger than the sum of its proper divisors (1).

230245721 is an equidigital number, since it uses as much as digits as its factorization.

230245721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3360, while the sum is 26.

The square root of 230245721 is about 15173.8499069946. The cubic root of 230245721 is about 612.9106803463.

Adding to 230245721 its reverse (127542032), we get a palindrome (357787753).

The spelling of 230245721 in words is "two hundred thirty million, two hundred forty-five thousand, seven hundred twenty-one".