331215340 has 24 divisors (see below), whose sum is σ = 695898000. Its totient is φ = 132420288.

The previous prime is 331215331. The next prime is 331215359. The reversal of 331215340 is 43512133.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67614 + ... + 72346.

It is an arithmetic number, because the mean of its divisors is an integer number (28995750).

Almost surely, 2^331215340 is an apocalyptic number.

It is an amenable number.

331215340 is an abundant number, since it is smaller than the sum of its proper divisors (364682660).

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

331215340 is a wasteful number, since it uses less digits than its factorization.

331215340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8241 (or 8239 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 22.

The square root of 331215340 is about 18199.3225148630. The cubic root of 331215340 is about 691.8896184214.

Adding to 331215340 its reverse (43512133), we get a palindrome (374727473).

The spelling of 331215340 in words is "three hundred thirty-one million, two hundred fifteen thousand, three hundred forty".