811543941 has 56 divisors (see below), whose sum is σ = 1379628320. Its totient is φ = 473021856.

The previous prime is 811543927. The next prime is 811543951. The reversal of 811543941 is 149345118.

811543941 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 811543941 - 2¹⁰ = 811542917 is a prime.

It is a super-2 number, since 2×811543941² = 1317207136347622962, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 811543896 and 811543905.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (811543951) by changing a digit.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 177810 + ... + 182316.

It is an arithmetic number, because the mean of its divisors is an integer number (24636220).

Almost surely, 2^811543941 is an apocalyptic number.

811543941 is a gapful number since it is divisible by the number (81) formed by its first and last digit.

It is an amenable number.

811543941 is a deficient number, since it is larger than the sum of its proper divisors (568084379).

811543941 is a wasteful number, since it uses less digits than its factorization.

811543941 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4557 (or 4542 counting only the distinct ones).

The product of its digits is 17280, while the sum is 36.

The square root of 811543941 is about 28487.6103069387. The cubic root of 811543941 is about 932.7616454637.

The spelling of 811543941 in words is "eight hundred eleven million, five hundred forty-three thousand, nine hundred forty-one".