30116621 has 4 divisors (see below), whose sum is σ = 30455100. Its totient is φ = 29778144.

The previous prime is 30116599. The next prime is 30116627. The reversal of 30116621 is 12661103.

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 15100996 + 15015625 = 3886^2 + 3875^2 .

It is a cyclic number.

It is not a de Polignac number, because 30116621 - 2¹⁰ = 30115597 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30116593 and 30116602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30116627) 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, 169106 + ... + 169283.

It is an arithmetic number, because the mean of its divisors is an integer number (7613775).

Almost surely, 2^30116621 is an apocalyptic number.

It is an amenable number.

30116621 is a deficient number, since it is larger than the sum of its proper divisors (338479).

30116621 is an equidigital number, since it uses as much as digits as its factorization.

30116621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 338478.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 30116621 is about 5487.8612409572. The cubic root of 30116621 is about 311.1253617291.

Adding to 30116621 its reverse (12661103), we get a palindrome (42777724).

The spelling of 30116621 in words is "thirty million, one hundred sixteen thousand, six hundred twenty-one".