320243321000 has 64 divisors (see below), whose sum is σ = 749462809680. Its totient is φ = 128081356800.

The previous prime is 320243320997. The next prime is 320243321009. The reversal of 320243321000 is 123342023.

It can be written as a sum of positive squares in 8 ways, for example, as 4513958596 + 315729362404 = 67186^2 + 561898^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (320243321009) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11098592 + ... + 11127408.

Almost surely, 2^320243321000 is an apocalyptic number.

It is an amenable number.

320243321000 is an abundant number, since it is smaller than the sum of its proper divisors (429219488680).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

320243321000 is a wasteful number, since it uses less digits than its factorization.

320243321000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39951 (or 39937 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 20.

Adding to 320243321000 its reverse (123342023), we get a palindrome (320366663023).

The spelling of 320243321000 in words is "three hundred twenty billion, two hundred forty-three million, three hundred twenty-one thousand".