491536211 has 2 divisors, whose sum is σ = 491536212. Its totient is φ = 491536210.

The previous prime is 491536207. The next prime is 491536237. The reversal of 491536211 is 112635194.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 491536211 - 2² = 491536207 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (491536261) 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, 245768105 + 245768106.

It is an arithmetic number, because the mean of its divisors is an integer number (245768106).

Almost surely, 2^491536211 is an apocalyptic number.

491536211 is a deficient number, since it is larger than the sum of its proper divisors (1).

491536211 is an equidigital number, since it uses as much as digits as its factorization.

491536211 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6480, while the sum is 32.

The square root of 491536211 is about 22170.6159364146. The cubic root of 491536211 is about 789.1965398544.

The spelling of 491536211 in words is "four hundred ninety-one million, five hundred thirty-six thousand, two hundred eleven".