82203217 has 4 divisors (see below), whose sum is σ = 82410676. Its totient is φ = 81995760.

The previous prime is 82203181. The next prime is 82203239. The reversal of 82203217 is 71230228.

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 74114881 + 8088336 = 8609^2 + 2844^2 .

It is a cyclic number.

It is not a de Polignac number, because 82203217 - 2¹⁵ = 82170449 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 82203191 and 82203200.

It is not an unprimeable number, because it can be changed into a prime (82203287) 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, 103134 + ... + 103927.

It is an arithmetic number, because the mean of its divisors is an integer number (20602669).

Almost surely, 2^82203217 is an apocalyptic number.

It is an amenable number.

82203217 is a deficient number, since it is larger than the sum of its proper divisors (207459).

82203217 is a wasteful number, since it uses less digits than its factorization.

82203217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207458.

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 82203217 is about 9066.5989764630. The cubic root of 82203217 is about 434.8067437673.

The spelling of 82203217 in words is "eighty-two million, two hundred three thousand, two hundred seventeen".