320043421 has 8 divisors (see below), whose sum is σ = 322126200. Its totient is φ = 317967360.

The previous prime is 320043419. The next prime is 320043431. The reversal of 320043421 is 124340023.

It can be written as a sum of positive squares in 4 ways, for example, as 127916100 + 192127321 = 11310^2 + 13861^2 .

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 320043421 - 2¹ = 320043419 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 (320043431) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 121365 + ... + 123973.

It is an arithmetic number, because the mean of its divisors is an integer number (40265775).

Almost surely, 2^320043421 is an apocalyptic number.

It is an amenable number.

320043421 is a deficient number, since it is larger than the sum of its proper divisors (2082779).

320043421 is a wasteful number, since it uses less digits than its factorization.

320043421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3359.

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 320043421 is about 17889.7574326764. The cubic root of 320043421 is about 684.0213142988.

Adding to 320043421 its reverse (124340023), we get a palindrome (444383444).

The spelling of 320043421 in words is "three hundred twenty million, forty-three thousand, four hundred twenty-one".