321540100 has 36 divisors (see below), whose sum is σ = 797421184. Its totient is φ = 110242080.

The previous prime is 321540083. The next prime is 321540103. The reversal of 321540100 is 1045123.

321540100 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (321540103) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 228972 + ... + 230371.

Almost surely, 2^321540100 is an apocalyptic number.

It is an amenable number.

321540100 is an abundant number, since it is smaller than the sum of its proper divisors (475881084).

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

321540100 is a wasteful number, since it uses less digits than its factorization.

321540100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 459364 (or 459357 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 321540100 is about 17931.5392535053. The cubic root of 321540100 is about 685.0859288016.

Adding to 321540100 its reverse (1045123), we get a palindrome (322585223).

The spelling of 321540100 in words is "three hundred twenty-one million, five hundred forty thousand, one hundred".