320321002 has 4 divisors (see below), whose sum is σ = 480481506. Its totient is φ = 160160500.

The previous prime is 320320997. The next prime is 320321003. The reversal of 320321002 is 200123023.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 200123023 = 23 ⋅8701001.

It can be written as a sum of positive squares in only one way, i.e., 312971481 + 7349521 = 17691^2 + 2711^2 .

It is not an unprimeable number, because it can be changed into a prime (320321003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80080249 + ... + 80080252.

Almost surely, 2^320321002 is an apocalyptic number.

320321002 is a deficient number, since it is larger than the sum of its proper divisors (160160504).

320321002 is a wasteful number, since it uses less digits than its factorization.

320321002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160160503.

The product of its (nonzero) digits is 72, while the sum is 13.

The square root of 320321002 is about 17897.5138496943. The cubic root of 320321002 is about 684.2190129455.

Adding to 320321002 its reverse (200123023), we get a palindrome (520444025).

The spelling of 320321002 in words is "three hundred twenty million, three hundred twenty-one thousand, two".