82217273 has 4 divisors (see below), whose sum is σ = 82709760. Its totient is φ = 81724788.

The previous prime is 82217269. The next prime is 82217281. The reversal of 82217273 is 37271228.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 82217273 - 2² = 82217269 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82217263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 245993 + ... + 246326.

It is an arithmetic number, because the mean of its divisors is an integer number (20677440).

Almost surely, 2^82217273 is an apocalyptic number.

It is an amenable number.

82217273 is a deficient number, since it is larger than the sum of its proper divisors (492487).

82217273 is a wasteful number, since it uses less digits than its factorization.

82217273 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 492486.

The product of its digits is 9408, while the sum is 32.

The square root of 82217273 is about 9067.3740961758. The cubic root of 82217273 is about 434.8315250168.

The spelling of 82217273 in words is "eighty-two million, two hundred seventeen thousand, two hundred seventy-three".