30130381 has 2 divisors, whose sum is σ = 30130382. Its totient is φ = 30130380.

The previous prime is 30130379. The next prime is 30130403. The reversal of 30130381 is 18303103.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25593481 + 4536900 = 5059^2 + 2130^2 .

It is a cyclic number.

It is not a de Polignac number, because 30130381 - 2¹ = 30130379 is a prime.

It is a super-2 number, since 2×30130381² = 1815679718410322, which contains 22 as substring.

Together with 30130379, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30130351) 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, 15065190 + 15065191.

It is an arithmetic number, because the mean of its divisors is an integer number (15065191).

Almost surely, 2^30130381 is an apocalyptic number.

It is an amenable number.

30130381 is a deficient number, since it is larger than the sum of its proper divisors (1).

30130381 is an equidigital number, since it uses as much as digits as its factorization.

30130381 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 30130381 is about 5489.1147738046. The cubic root of 30130381 is about 311.1727379288.

Adding to 30130381 its reverse (18303103), we get a palindrome (48433484).

The spelling of 30130381 in words is "thirty million, one hundred thirty thousand, three hundred eighty-one".