30230281 has 2 divisors, whose sum is σ = 30230282. Its totient is φ = 30230280.

The previous prime is 30230279. The next prime is 30230287. The reversal of 30230281 is 18203203.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30074256 + 156025 = 5484^2 + 395^2 .

It is an emirp because it is prime and its reverse (18203203) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 30230281 - 2¹ = 30230279 is a prime.

It is a super-2 number, since 2×30230281² = 1827739778677922, which contains 22 as substring.

Together with 30230279, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (30230287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15115140 + 15115141.

It is an arithmetic number, because the mean of its divisors is an integer number (15115141).

Almost surely, 2^30230281 is an apocalyptic number.

It is an amenable number.

30230281 is a deficient number, since it is larger than the sum of its proper divisors (1).

30230281 is an equidigital number, since it uses as much as digits as its factorization.

30230281 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 30230281 is about 5498.2070714006. The cubic root of 30230281 is about 311.5162656497.

Adding to 30230281 its reverse (18203203), we get a palindrome (48433484).

The spelling of 30230281 in words is "thirty million, two hundred thirty thousand, two hundred eighty-one".