321303140 has 12 divisors (see below), whose sum is σ = 674736636. Its totient is φ = 128521248.

The previous prime is 321303137. The next prime is 321303161. The reversal of 321303140 is 41303123.

It is a happy number.

321303140 is digitally balanced in base 3 and base 9, because in such bases it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 133448704 + 187854436 = 11552^2 + 13706^2 .

321303140 is strictly pandigital in base 9.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8032559 + ... + 8032598.

It is an arithmetic number, because the mean of its divisors is an integer number (56228053).

Almost surely, 2^321303140 is an apocalyptic number.

It is an amenable number.

321303140 is an abundant number, since it is smaller than the sum of its proper divisors (353433496).

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

321303140 is a wasteful number, since it uses less digits than its factorization.

321303140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16065166 (or 16065164 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 321303140 is about 17924.9306832690. The cubic root of 321303140 is about 684.9175953583.

Subtracting from 321303140 its sum of digits (17), we obtain a palindrome (321303123).

Adding to 321303140 its reverse (41303123), we get a palindrome (362606263).

The spelling of 321303140 in words is "three hundred twenty-one million, three hundred three thousand, one hundred forty".