82821271 has 8 divisors (see below), whose sum is σ = 91368144. Its totient is φ = 74585280.

The previous prime is 82821269. The next prime is 82821283. The reversal of 82821271 is 17212828.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 82821271 - 2¹ = 82821269 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82821251) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 77161 + ... + 78226.

It is an arithmetic number, because the mean of its divisors is an integer number (11421018).

Almost surely, 2^82821271 is an apocalyptic number.

82821271 is a deficient number, since it is larger than the sum of its proper divisors (8546873).

82821271 is a wasteful number, since it uses less digits than its factorization.

82821271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155441.

The product of its digits is 3584, while the sum is 31.

The square root of 82821271 is about 9100.6192646435. The cubic root of 82821271 is about 435.8937383074.

The spelling of 82821271 in words is "eighty-two million, eight hundred twenty-one thousand, two hundred seventy-one".