811975211 has 16 divisors (see below), whose sum is σ = 843913728. Its totient is φ = 780780000.

The previous prime is 811975201. The next prime is 811975253. The reversal of 811975211 is 112579118.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-811975211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (811975201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 890846 + ... + 891756.

It is an arithmetic number, because the mean of its divisors is an integer number (52744608).

Almost surely, 2^811975211 is an apocalyptic number.

811975211 is a deficient number, since it is larger than the sum of its proper divisors (31938517).

811975211 is a wasteful number, since it uses less digits than its factorization.

811975211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1282.

The product of its digits is 5040, while the sum is 35.

The square root of 811975211 is about 28495.1787325505. The cubic root of 811975211 is about 932.9268453407.

The spelling of 811975211 in words is "eight hundred eleven million, nine hundred seventy-five thousand, two hundred eleven".