30985211 has 2 divisors, whose sum is σ = 30985212. Its totient is φ = 30985210.

The previous prime is 30985189. The next prime is 30985223. The reversal of 30985211 is 11258903.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 30985211 - 2⁶ = 30985147 is a prime.

It is not a weakly prime, because it can be changed into another prime (30985111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15492605 + 15492606.

It is an arithmetic number, because the mean of its divisors is an integer number (15492606).

Almost surely, 2^30985211 is an apocalyptic number.

30985211 is a deficient number, since it is larger than the sum of its proper divisors (1).

30985211 is an equidigital number, since it uses as much as digits as its factorization.

30985211 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2160, while the sum is 29.

The square root of 30985211 is about 5566.4361129901. The cubic root of 30985211 is about 314.0881025851.

The spelling of 30985211 in words is "thirty million, nine hundred eighty-five thousand, two hundred eleven".