321222540 has 48 divisors (see below), whose sum is σ = 900984672. Its totient is φ = 85510656.

The previous prime is 321222529. The next prime is 321222541. The reversal of 321222540 is 45222123.

It is not an unprimeable number, because it can be changed into a prime (321222541) 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, 32682 + ... + 41358.

It is an arithmetic number, because the mean of its divisors is an integer number (18770514).

Almost surely, 2^321222540 is an apocalyptic number.

321222540 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

321222540 is an abundant number, since it is smaller than the sum of its proper divisors (579762132).

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

321222540 is a wasteful number, since it uses less digits than its factorization.

321222540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9306 (or 9304 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 321222540 is about 17922.6822769361. The cubic root of 321222540 is about 684.8603192557.

Adding to 321222540 its reverse (45222123), we get a palindrome (366444663).

It can be divided in two parts, 3212 and 22540, that added together give a palindrome (25752).

The spelling of 321222540 in words is "three hundred twenty-one million, two hundred twenty-two thousand, five hundred forty".