320217005 has 8 divisors (see below), whose sum is σ = 384559224. Its totient is φ = 255974400.

The previous prime is 320216993. The next prime is 320217019. The reversal of 320217005 is 500712023.

It can be written as a sum of positive squares in 4 ways, for example, as 205234276 + 114982729 = 14326^2 + 10723^2 .

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

It is not a de Polignac number, because 320217005 - 2²² = 316022701 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17636 + ... + 30845.

It is an arithmetic number, because the mean of its divisors is an integer number (48069903).

Almost surely, 2^320217005 is an apocalyptic number.

It is an amenable number.

320217005 is a deficient number, since it is larger than the sum of its proper divisors (64342219).

320217005 is a wasteful number, since it uses less digits than its factorization.

320217005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49807.

The product of its (nonzero) digits is 420, while the sum is 20.

The square root of 320217005 is about 17894.6082661789. The cubic root of 320217005 is about 684.1449576215.

Adding to 320217005 its reverse (500712023), we get a palindrome (820929028).

The spelling of 320217005 in words is "three hundred twenty million, two hundred seventeen thousand, five".