30198281 has 2 divisors, whose sum is σ = 30198282. Its totient is φ = 30198280.

The previous prime is 30198269. The next prime is 30198283. The reversal of 30198281 is 18289103.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16810000 + 13388281 = 4100^2 + 3659^2 .

It is a cyclic number.

It is not a de Polignac number, because 30198281 - 2¹⁴ = 30181897 is a prime.

It is a super-2 number, since 2×30198281² = 1823872350709922, which contains 22 as substring.

Together with 30198283, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (30198283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15099140 + 15099141.

It is an arithmetic number, because the mean of its divisors is an integer number (15099141).

Almost surely, 2^30198281 is an apocalyptic number.

It is an amenable number.

30198281 is a deficient number, since it is larger than the sum of its proper divisors (1).

30198281 is an equidigital number, since it uses as much as digits as its factorization.

30198281 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 32.

The square root of 30198281 is about 5495.2962613493. The cubic root of 30198281 is about 311.4063092351.

The spelling of 30198281 in words is "thirty million, one hundred ninety-eight thousand, two hundred eighty-one".