331340065 has 32 divisors (see below), whose sum is σ = 472018176. Its totient is φ = 218557440.

The previous prime is 331340063. The next prime is 331340071. The reversal of 331340065 is 560043133.

It is not a de Polignac number, because 331340065 - 2¹ = 331340063 is a prime.

It is not an unprimeable number, because it can be changed into a prime (331340063) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 103174 + ... + 106336.

It is an arithmetic number, because the mean of its divisors is an integer number (14750568).

Almost surely, 2^331340065 is an apocalyptic number.

331340065 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

331340065 is a deficient number, since it is larger than the sum of its proper divisors (140678111).

331340065 is a wasteful number, since it uses less digits than its factorization.

331340065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3289.

The product of its (nonzero) digits is 3240, while the sum is 25.

The square root of 331340065 is about 18202.7488308772. The cubic root of 331340065 is about 691.9764552839.

Adding to 331340065 its reverse (560043133), we get a palindrome (891383198).

The spelling of 331340065 in words is "three hundred thirty-one million, three hundred forty thousand, sixty-five".