331340865 has 16 divisors (see below), whose sum is σ = 547247616. Its totient is φ = 171014400.

The previous prime is 331340851. The next prime is 331340881. The reversal of 331340865 is 568043133.

It is not a de Polignac number, because 331340865 - 2⁸ = 331340609 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 355816 + ... + 356745.

It is an arithmetic number, because the mean of its divisors is an integer number (34202976).

Almost surely, 2^331340865 is an apocalyptic number.

It is an amenable number.

331340865 is a deficient number, since it is larger than the sum of its proper divisors (215906751).

331340865 is a wasteful number, since it uses less digits than its factorization.

331340865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 712600.

The product of its (nonzero) digits is 25920, while the sum is 33.

The square root of 331340865 is about 18202.7708055669. The cubic root of 331340865 is about 691.9770121948.

Adding to 331340865 its reverse (568043133), we get a palindrome (899383998).

The spelling of 331340865 in words is "three hundred thirty-one million, three hundred forty thousand, eight hundred sixty-five".