320021043 has 4 divisors (see below), whose sum is σ = 426694728. Its totient is φ = 213347360.

The previous prime is 320021041. The next prime is 320021071. The reversal of 320021043 is 340120023.

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 320021043 - 2¹ = 320021041 is a prime.

It is not an unprimeable number, because it can be changed into a prime (320021041) 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, 53336838 + ... + 53336843.

It is an arithmetic number, because the mean of its divisors is an integer number (106673682).

Almost surely, 2^320021043 is an apocalyptic number.

320021043 is a deficient number, since it is larger than the sum of its proper divisors (106673685).

320021043 is a wasteful number, since it uses less digits than its factorization.

320021043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106673684.

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 320021043 is about 17889.1319800598. The cubic root of 320021043 is about 684.0053712687.

Adding to 320021043 its reverse (340120023), we get a palindrome (660141066).

The spelling of 320021043 in words is "three hundred twenty million, twenty-one thousand, forty-three".