82167217 has 8 divisors (see below), whose sum is σ = 90024480. Its totient is φ = 74374560.

The previous prime is 82167199. The next prime is 82167223. The reversal of 82167217 is 71276128.

It is a happy number.

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 82167217 - 2¹⁹ = 81642929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82167287) 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, 13467 + ... + 18592.

It is an arithmetic number, because the mean of its divisors is an integer number (11253060).

Almost surely, 2^82167217 is an apocalyptic number.

It is an amenable number.

82167217 is a deficient number, since it is larger than the sum of its proper divisors (7857263).

82167217 is a wasteful number, since it uses less digits than its factorization.

82167217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32303.

The product of its digits is 9408, while the sum is 34.

The square root of 82167217 is about 9064.6134501147. The cubic root of 82167217 is about 434.7432615464.

The spelling of 82167217 in words is "eighty-two million, one hundred sixty-seven thousand, two hundred seventeen".