320012143 has 8 divisors (see below), whose sum is σ = 356532480. Its totient is φ = 284729880.

The previous prime is 320012141. The next prime is 320012153. The reversal of 320012143 is 341210023.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 320012143 - 2¹ = 320012141 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 (320012141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 308973 + ... + 310006.

It is an arithmetic number, because the mean of its divisors is an integer number (44566560).

Almost surely, 2^320012143 is an apocalyptic number.

320012143 is a deficient number, since it is larger than the sum of its proper divisors (36520337).

320012143 is a wasteful number, since it uses less digits than its factorization.

320012143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 619037.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 320012143 is about 17888.8832239467. The cubic root of 320012143 is about 683.9990303270. Note that the first 3 decimals are identical.

Adding to 320012143 its reverse (341210023), we get a palindrome (661222166).

The spelling of 320012143 in words is "three hundred twenty million, twelve thousand, one hundred forty-three".