320521222706 has 4 divisors (see below), whose sum is σ = 480781834062. Its totient is φ = 160260611352.

The previous prime is 320521222699. The next prime is 320521222783. The reversal of 320521222706 is 607222125023.

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

It can be written as a sum of positive squares in only one way, i.e., 270259618225 + 50261604481 = 519865^2 + 224191^2 .

It is a Curzon number.

It is an unprimeable number.

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, 80130305675 + ... + 80130305678.

Almost surely, 2^320521222706 is an apocalyptic number.

320521222706 is a deficient number, since it is larger than the sum of its proper divisors (160260611356).

320521222706 is a wasteful number, since it uses less digits than its factorization.

320521222706 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160260611355.

The product of its (nonzero) digits is 20160, while the sum is 32.

Adding to 320521222706 its reverse (607222125023), we get a palindrome (927743347729).

The spelling of 320521222706 in words is "three hundred twenty billion, five hundred twenty-one million, two hundred twenty-two thousand, seven hundred six".