30518113 has 4 divisors (see below), whose sum is σ = 30578580. Its totient is φ = 30457648.

The previous prime is 30518101. The next prime is 30518129. The reversal of 30518113 is 31181503.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 16916769 + 13601344 = 4113^2 + 3688^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30518113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30518183) 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 3 ways as a sum of consecutive naturals, for example, 29470 + ... + 30487.

It is an arithmetic number, because the mean of its divisors is an integer number (7644645).

Almost surely, 2^30518113 is an apocalyptic number.

It is an amenable number.

30518113 is a deficient number, since it is larger than the sum of its proper divisors (60467).

30518113 is an equidigital number, since it uses as much as digits as its factorization.

30518113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60466.

The product of its (nonzero) digits is 360, while the sum is 22.

The square root of 30518113 is about 5524.3201391664. The cubic root of 30518113 is about 312.5018256960.

Adding to 30518113 its reverse (31181503), we get a palindrome (61699616).

The spelling of 30518113 in words is "thirty million, five hundred eighteen thousand, one hundred thirteen".