811054081 has 4 divisors (see below), whose sum is σ = 811131732. Its totient is φ = 810976432.

The previous prime is 811054039. The next prime is 811054091. The reversal of 811054081 is 180450118.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 86583025 + 724471056 = 9305^2 + 26916^2 .

It is a cyclic number.

It is not a de Polignac number, because 811054081 - 2¹⁹ = 810529793 is a prime.

It is a super-2 number, since 2×811054081² = 1315617444613509122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (811054021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20170 + ... + 45043.

It is an arithmetic number, because the mean of its divisors is an integer number (202782933).

Almost surely, 2^811054081 is an apocalyptic number.

It is an amenable number.

811054081 is a deficient number, since it is larger than the sum of its proper divisors (77651).

811054081 is a wasteful number, since it uses less digits than its factorization.

811054081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77650.

The product of its (nonzero) digits is 1280, while the sum is 28.

The square root of 811054081 is about 28479.0112363474. The cubic root of 811054081 is about 932.5739314196.

The spelling of 811054081 in words is "eight hundred eleven million, fifty-four thousand, eighty-one".