30116521 has 2 divisors, whose sum is σ = 30116522. Its totient is φ = 30116520.

The previous prime is 30116473. The next prime is 30116543. The reversal of 30116521 is 12561103.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18826921 + 11289600 = 4339^2 + 3360^2 .

It is an emirp because it is prime and its reverse (12561103) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 30116521 - 2¹³ = 30108329 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (30116551) 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, 15058260 + 15058261.

It is an arithmetic number, because the mean of its divisors is an integer number (15058261).

Almost surely, 2^30116521 is an apocalyptic number.

It is an amenable number.

30116521 is a deficient number, since it is larger than the sum of its proper divisors (1).

30116521 is an equidigital number, since it uses as much as digits as its factorization.

30116521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 30116521 is about 5487.8521299321. The cubic root of 30116521 is about 311.1250173725.

Adding to 30116521 its reverse (12561103), we get a palindrome (42677624).

The spelling of 30116521 in words is "thirty million, one hundred sixteen thousand, five hundred twenty-one".