30103081 has 2 divisors, whose sum is σ = 30103082. Its totient is φ = 30103080.

The previous prime is 30103079. The next prime is 30103103. The reversal of 30103081 is 18030103.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25000000 + 5103081 = 5000^2 + 2259^2 .

It is a cyclic number.

It is not a de Polignac number, because 30103081 - 2¹ = 30103079 is a prime.

It is a super-2 number, since 2×30103081² = 1812390971385122, which contains 22 as substring.

Together with 30103079, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (30103001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15051540 + 15051541.

It is an arithmetic number, because the mean of its divisors is an integer number (15051541).

Almost surely, 2^30103081 is an apocalyptic number.

It is an amenable number.

30103081 is a deficient number, since it is larger than the sum of its proper divisors (1).

30103081 is an equidigital number, since it uses as much as digits as its factorization.

30103081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 30103081 is about 5486.6274704959. The cubic root of 30103081 is about 311.0787289095.

Adding to 30103081 its reverse (18030103), we get a palindrome (48133184).

The spelling of 30103081 in words is "thirty million, one hundred three thousand, eighty-one".