331121322 has 72 divisors (see below), whose sum is σ = 878529600. Its totient is φ = 89622288.

The previous prime is 331121299. The next prime is 331121347. The reversal of 331121322 is 223121133.

331121322 is a `hidden beast` number, since 331 + 12 + 1 + 322 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

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 = 331121295 and 331121304.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 6879 + ... + 26637.

It is an arithmetic number, because the mean of its divisors is an integer number (12201800).

Almost surely, 2^331121322 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 331121322, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (439264800).

331121322 is an abundant number, since it is smaller than the sum of its proper divisors (547408278).

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

331121322 is a wasteful number, since it uses less digits than its factorization.

331121322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19800 (or 19790 counting only the distinct ones).

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

The square root of 331121322 is about 18196.7393232964. The cubic root of 331121322 is about 691.8241461779.

Adding to 331121322 its reverse (223121133), we get a palindrome (554242455).

The spelling of 331121322 in words is "three hundred thirty-one million, one hundred twenty-one thousand, three hundred twenty-two".