320223144 has 32 divisors (see below), whose sum is σ = 801702720. Its totient is φ = 106588416.

The previous prime is 320223139. The next prime is 320223229. The reversal of 320223144 is 441322023.

It is a self number, because there is not a number n which added to its sum of digits gives 320223144.

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, 8272 + ... + 26624.

It is an arithmetic number, because the mean of its divisors is an integer number (25053210).

Almost surely, 2^320223144 is an apocalyptic number.

It is an amenable number.

320223144 is an abundant number, since it is smaller than the sum of its proper divisors (481479576).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

320223144 is a wasteful number, since it uses less digits than its factorization.

320223144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19089 (or 19085 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 21.

The square root of 320223144 is about 17894.7797974717. The cubic root of 320223144 is about 684.1493295932.

Adding to 320223144 its reverse (441322023), we get a palindrome (761545167).

The spelling of 320223144 in words is "three hundred twenty million, two hundred twenty-three thousand, one hundred forty-four".