1000320321 has 32 divisors (see below), whose sum is σ = 1790788608. Its totient is φ = 479672640.

The previous prime is 1000320283. The next prime is 1000320331. The reversal of 1000320321 is 1230230001.

It is a happy number.

It is not a de Polignac number, because 1000320321 - 2⁶ = 1000320257 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1000320297 and 1000320306.

It is not an unprimeable number, because it can be changed into a prime (1000320331) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 163551 + ... + 169556.

It is an arithmetic number, because the mean of its divisors is an integer number (55962144).

Almost surely, 2^1000320321 is an apocalyptic number.

1000320321 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1000320321 is a deficient number, since it is larger than the sum of its proper divisors (790468287).

1000320321 is a wasteful number, since it uses less digits than its factorization.

1000320321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333141.

The product of its (nonzero) digits is 36, while the sum is 12.

The square root of 1000320321 is about 31627.8409158766. The cubic root of 1000320321 is about 1000.1067622681.

Adding to 1000320321 its reverse (1230230001), we get a palindrome (2230550322).

The spelling of 1000320321 in words is "one billion, three hundred twenty thousand, three hundred twenty-one".