30183281 has 2 divisors, whose sum is σ = 30183282. Its totient is φ = 30183280.

The previous prime is 30183277. The next prime is 30183289. The reversal of 30183281 is 18238103.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30030400 + 152881 = 5480^2 + 391^2 .

It is a cyclic number.

It is not a de Polignac number, because 30183281 - 2² = 30183277 is a prime.

It is a super-2 number, since 2×30183281² = 1822060903849922, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 30183281.

It is not a weakly prime, because it can be changed into another prime (30183289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15091640 + 15091641.

It is an arithmetic number, because the mean of its divisors is an integer number (15091641).

Almost surely, 2^30183281 is an apocalyptic number.

It is an amenable number.

30183281 is a deficient number, since it is larger than the sum of its proper divisors (1).

30183281 is an equidigital number, since it uses as much as digits as its factorization.

30183281 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 30183281 is about 5493.9312882489. The cubic root of 30183281 is about 311.3547404249.

The spelling of 30183281 in words is "thirty million, one hundred eighty-three thousand, two hundred eighty-one".