320250005 has 8 divisors (see below), whose sum is σ = 384411192. Its totient is φ = 256125888.

The previous prime is 320249983. The next prime is 320250031. The reversal of 320250005 is 500052023.

It can be written as a sum of positive squares in 4 ways, for example, as 56220004 + 264030001 = 7498^2 + 16249^2 .

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 320250005 - 2¹⁸ = 319987861 is a prime.

It is a Duffinian number.

It is a Curzon 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, 16019 + ... + 29951.

It is an arithmetic number, because the mean of its divisors is an integer number (48051399).

Almost surely, 2^320250005 is an apocalyptic number.

It is an amenable number.

320250005 is a deficient number, since it is larger than the sum of its proper divisors (64161187).

320250005 is a wasteful number, since it uses less digits than its factorization.

320250005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18535.

The product of its (nonzero) digits is 300, while the sum is 17.

The square root of 320250005 is about 17895.5303078730. The cubic root of 320250005 is about 684.1684583598.

The spelling of 320250005 in words is "three hundred twenty million, two hundred fifty thousand, five".