30504181 has 2 divisors, whose sum is σ = 30504182. Its totient is φ = 30504180.

The previous prime is 30504163. The next prime is 30504211. The reversal of 30504181 is 18140503.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24700900 + 5803281 = 4970^2 + 2409^2 .

It is an emirp because it is prime and its reverse (18140503) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 30504181 - 2¹¹ = 30502133 is a prime.

It is a super-2 number, since 2×30504181² = 1861010116961522, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30504151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15252090 + 15252091.

It is an arithmetic number, because the mean of its divisors is an integer number (15252091).

Almost surely, 2^30504181 is an apocalyptic number.

It is an amenable number.

30504181 is a deficient number, since it is larger than the sum of its proper divisors (1).

30504181 is an equidigital number, since it uses as much as digits as its factorization.

30504181 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 30504181 is about 5523.0590255763. The cubic root of 30504181 is about 312.4542644534.

Adding to 30504181 its reverse (18140503), we get a palindrome (48644684).

The spelling of 30504181 in words is "thirty million, five hundred four thousand, one hundred eighty-one".