321131104 has 36 divisors (see below), whose sum is σ = 735451164. Its totient is φ = 137626944.

The previous prime is 321131099. The next prime is 321131117. The reversal of 321131104 is 401131123.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 100834 + ... + 103969.

It is an arithmetic number, because the mean of its divisors is an integer number (20429199).

Almost surely, 2^321131104 is an apocalyptic number.

It is an amenable number.

321131104 is an abundant number, since it is smaller than the sum of its proper divisors (414320060).

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

321131104 is a wasteful number, since it uses less digits than its factorization.

321131104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204827 (or 204812 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 321131104 is about 17920.1312495194. The cubic root of 321131104 is about 684.7953312562.

Adding to 321131104 its reverse (401131123), we get a palindrome (722262227).

The spelling of 321131104 in words is "three hundred twenty-one million, one hundred thirty-one thousand, one hundred four".