320443142 has 4 divisors (see below), whose sum is σ = 480664716. Its totient is φ = 160221570.

The previous prime is 320443139. The next prime is 320443159. The reversal of 320443142 is 241344023.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80110784 + ... + 80110787.

It is an arithmetic number, because the mean of its divisors is an integer number (120166179).

Almost surely, 2^320443142 is an apocalyptic number.

320443142 is a deficient number, since it is larger than the sum of its proper divisors (160221574).

320443142 is a wasteful number, since it uses less digits than its factorization.

320443142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160221573.

The product of its (nonzero) digits is 2304, while the sum is 23.

The square root of 320443142 is about 17900.9257302521. The cubic root of 320443142 is about 684.3059672715.

Adding to 320443142 its reverse (241344023), we get a palindrome (561787165).

The spelling of 320443142 in words is "three hundred twenty million, four hundred forty-three thousand, one hundred forty-two".