321131322 has 12 divisors (see below), whose sum is σ = 695784570. Its totient is φ = 107043768.

The previous prime is 321131299. The next prime is 321131339. The reversal of 321131322 is 223131123.

It can be written as a sum of positive squares in only one way, i.e., 318943881 + 2187441 = 17859^2 + 1479^2 .

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 17840629 = 321131322 / (3 + 2 + 1 + 1 + 3 + 1 + 3 + 2 + 2).

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 321131295 and 321131304.

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, 8920297 + ... + 8920332.

Almost surely, 2^321131322 is an apocalyptic number.

321131322 is an abundant number, since it is smaller than the sum of its proper divisors (374653248).

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

321131322 is a wasteful number, since it uses less digits than its factorization.

321131322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17840637 (or 17840634 counting only the distinct ones).

The product of its digits is 216, while the sum is 18.

The square root of 321131322 is about 17920.1373320631. The cubic root of 321131322 is about 684.7954862140.

Adding to 321131322 its reverse (223131123), we get a palindrome (544262445).

The spelling of 321131322 in words is "three hundred twenty-one million, one hundred thirty-one thousand, three hundred twenty-two".