82450217 has 4 divisors (see below), whose sum is σ = 82487556. Its totient is φ = 82412880.

The previous prime is 82450211. The next prime is 82450229. The reversal of 82450217 is 71205428.

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

It can be written as a sum of positive squares in 2 ways, for example, as 29800681 + 52649536 = 5459^2 + 7256^2 .

It is a cyclic number.

It is not a de Polignac number, because 82450217 - 2⁴ = 82450201 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 82450217.

It is not an unprimeable number, because it can be changed into a prime (82450211) 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, 15134 + ... + 19847.

It is an arithmetic number, because the mean of its divisors is an integer number (20621889).

Almost surely, 2^82450217 is an apocalyptic number.

It is an amenable number.

82450217 is a deficient number, since it is larger than the sum of its proper divisors (37339).

82450217 is a wasteful number, since it uses less digits than its factorization.

82450217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37338.

The product of its (nonzero) digits is 4480, while the sum is 29.

The square root of 82450217 is about 9080.2101847920. The cubic root of 82450217 is about 435.2418032924.

The spelling of 82450217 in words is "eighty-two million, four hundred fifty thousand, two hundred seventeen".