331121316 has 24 divisors (see below), whose sum is σ = 787195584. Its totient is φ = 108291040.

The previous prime is 331121299. The next prime is 331121347. The reversal of 331121316 is 613121133.

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 = 331121292 and 331121301.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 259680 + ... + 260951.

It is an arithmetic number, because the mean of its divisors is an integer number (32799816).

Almost surely, 2^331121316 is an apocalyptic number.

It is an amenable number.

331121316 is an abundant number, since it is smaller than the sum of its proper divisors (456074268).

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

331121316 is a wasteful number, since it uses less digits than its factorization.

331121316 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 520691 (or 520689 counting only the distinct ones).

The product of its digits is 324, while the sum is 21.

The square root of 331121316 is about 18196.7391584317. The cubic root of 331121316 is about 691.8241419993.

Adding to 331121316 its reverse (613121133), we get a palindrome (944242449).

The spelling of 331121316 in words is "three hundred thirty-one million, one hundred twenty-one thousand, three hundred sixteen".