811081311 has 32 divisors (see below), whose sum is σ = 1128969408. Its totient is φ = 517570560.

The previous prime is 811081307. The next prime is 811081333. The reversal of 811081311 is 113180118.

811081311 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 811081311 - 2² = 811081307 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (811081811) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1872951 + ... + 1873383.

It is an arithmetic number, because the mean of its divisors is an integer number (35280294).

Almost surely, 2^811081311 is an apocalyptic number.

811081311 is a deficient number, since it is larger than the sum of its proper divisors (317888097).

811081311 is a wasteful number, since it uses less digits than its factorization.

811081311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 731.

The product of its (nonzero) digits is 192, while the sum is 24.

The square root of 811081311 is about 28479.4893037077. The cubic root of 811081311 is about 932.5843679221.

The spelling of 811081311 in words is "eight hundred eleven million, eighty-one thousand, three hundred eleven".