30245681 has 2 divisors, whose sum is σ = 30245682. Its totient is φ = 30245680.

The previous prime is 30245653. The next prime is 30245711. The reversal of 30245681 is 18654203.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 29866225 + 379456 = 5465^2 + 616^2 .

It is a cyclic number.

It is not a de Polignac number, because 30245681 - 2⁶ = 30245617 is a prime.

It is a super-2 number, since 2×30245681² = 1829602438307522, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is equal to p_1872209 and since 30245681 and 1872209 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (30241681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15122840 + 15122841.

It is an arithmetic number, because the mean of its divisors is an integer number (15122841).

Almost surely, 2^30245681 is an apocalyptic number.

It is an amenable number.

30245681 is a deficient number, since it is larger than the sum of its proper divisors (1).

30245681 is an equidigital number, since it uses as much as digits as its factorization.

30245681 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 30245681 is about 5499.6073496205. The cubic root of 30245681 is about 311.5691545184.

Adding to 30245681 its reverse (18654203), we get a palindrome (48899884).

The spelling of 30245681 in words is "thirty million, two hundred forty-five thousand, six hundred eighty-one".