30130581 has 16 divisors (see below), whose sum is σ = 43499456. Its totient is φ = 18441216.

The previous prime is 30130571. The next prime is 30130591. The reversal of 30130581 is 18503103.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (30130571) and next prime (30130591).

It is not a de Polignac number, because 30130581 - 2⁶ = 30130517 is a prime.

It is a super-2 number, since 2×30130581² = 1815703822795122, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30130501) 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 in 15 ways as a sum of consecutive naturals, for example, 5526 + ... + 9528.

It is an arithmetic number, because the mean of its divisors is an integer number (2718716).

Almost surely, 2^30130581 is an apocalyptic number.

It is an amenable number.

30130581 is a deficient number, since it is larger than the sum of its proper divisors (13368875).

30130581 is a wasteful number, since it uses less digits than its factorization.

30130581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4212.

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 30130581 is about 5489.1329916481. The cubic root of 30130581 is about 311.1734264300.

Adding to 30130581 its reverse (18503103), we get a palindrome (48633684).

The spelling of 30130581 in words is "thirty million, one hundred thirty thousand, five hundred eighty-one".