82811443 has 32 divisors (see below), whose sum is σ = 106041600. Its totient is φ = 63504000.

The previous prime is 82811441. The next prime is 82811453. The reversal of 82811443 is 34411828.

It is a cyclic number.

It is not a de Polignac number, because 82811443 - 2¹ = 82811441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82811441) 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, 78268 + ... + 79318.

It is an arithmetic number, because the mean of its divisors is an integer number (3313800).

Almost surely, 2^82811443 is an apocalyptic number.

82811443 is a deficient number, since it is larger than the sum of its proper divisors (23230157).

82811443 is a wasteful number, since it uses less digits than its factorization.

82811443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1123.

The product of its digits is 6144, while the sum is 31.

The square root of 82811443 is about 9100.0792853689. The cubic root of 82811443 is about 435.8764958242.

The spelling of 82811443 in words is "eighty-two million, eight hundred eleven thousand, four hundred forty-three".