320142143 has 4 divisors (see below), whose sum is σ = 320727960. Its totient is φ = 319556328.

The previous prime is 320142131. The next prime is 320142149. The reversal of 320142143 is 341241023.

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

It is a cyclic number.

It is not a de Polignac number, because 320142143 - 2⁴ = 320142127 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320142149) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 292088 + ... + 293181.

It is an arithmetic number, because the mean of its divisors is an integer number (80181990).

Almost surely, 2^320142143 is an apocalyptic number.

320142143 is a deficient number, since it is larger than the sum of its proper divisors (585817).

320142143 is an equidigital number, since it uses as much as digits as its factorization.

320142143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 585816.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 320142143 is about 17892.5163965273. The cubic root of 320142143 is about 684.0916391419.

Adding to 320142143 its reverse (341241023), we get a palindrome (661383166).

The spelling of 320142143 in words is "three hundred twenty million, one hundred forty-two thousand, one hundred forty-three".