30030072581 has 2 divisors, whose sum is σ = 30030072582. Its totient is φ = 30030072580.

The previous prime is 30030072563. The next prime is 30030072593. The reversal of 30030072581 is 18527003003.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20832303556 + 9197769025 = 144334^2 + 95905^2 .

It is a cyclic number.

It is not a de Polignac number, because 30030072581 - 2¹⁰ = 30030071557 is a prime.

It is a super-2 number, since 2×30030072581² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30030071581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15015036290 + 15015036291.

It is an arithmetic number, because the mean of its divisors is an integer number (15015036291).

Almost surely, 2^30030072581 is an apocalyptic number.

It is an amenable number.

30030072581 is a deficient number, since it is larger than the sum of its proper divisors (1).

30030072581 is an equidigital number, since it uses as much as digits as its factorization.

30030072581 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5040, while the sum is 29.

Adding to 30030072581 its reverse (18527003003), we get a palindrome (48557075584).

The spelling of 30030072581 in words is "thirty billion, thirty million, seventy-two thousand, five hundred eighty-one".