320221242 has 32 divisors (see below), whose sum is σ = 776295360. Its totient is φ = 97036560.

The previous prime is 320221217. The next prime is 320221303. The reversal of 320221242 is 242122023.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 268953 + ... + 270140.

It is an arithmetic number, because the mean of its divisors is an integer number (24259230).

Almost surely, 2^320221242 is an apocalyptic number.

320221242 is an abundant number, since it is smaller than the sum of its proper divisors (456074118).

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

320221242 is a wasteful number, since it uses less digits than its factorization.

320221242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 539115 (or 539109 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 320221242 is about 17894.7266534027. The cubic root of 320221242 is about 684.1479750642.

Adding to 320221242 its reverse (242122023), we get a palindrome (562343265).

The spelling of 320221242 in words is "three hundred twenty million, two hundred twenty-one thousand, two hundred forty-two".