82821043 has 4 divisors (see below), whose sum is σ = 82860088. Its totient is φ = 82782000.

The previous prime is 82821041. The next prime is 82821113. The reversal of 82821043 is 34012828.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 82821043 - 2¹ = 82821041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82821041) 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, 16146 + ... + 20647.

It is an arithmetic number, because the mean of its divisors is an integer number (20715022).

Almost surely, 2^82821043 is an apocalyptic number.

82821043 is a deficient number, since it is larger than the sum of its proper divisors (39045).

82821043 is a wasteful number, since it uses less digits than its factorization.

82821043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39044.

The product of its (nonzero) digits is 3072, while the sum is 28.

The square root of 82821043 is about 9100.6067380148. The cubic root of 82821043 is about 435.8933383141.

The spelling of 82821043 in words is "eighty-two million, eight hundred twenty-one thousand, forty-three".