320065231 has 16 divisors (see below), whose sum is σ = 335121408. Its totient is φ = 305474400.

The previous prime is 320065201. The next prime is 320065237. The reversal of 320065231 is 132560023.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-320065231 is a prime.

It is a super-2 number, since 2×320065231² = 204883504190166722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320065237) 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 15 ways as a sum of consecutive naturals, for example, 289626 + ... + 290728.

It is an arithmetic number, because the mean of its divisors is an integer number (20945088).

Almost surely, 2^320065231 is an apocalyptic number.

320065231 is a deficient number, since it is larger than the sum of its proper divisors (15056177).

320065231 is a wasteful number, since it uses less digits than its factorization.

320065231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1302.

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

The square root of 320065231 is about 17890.3669889692. The cubic root of 320065231 is about 684.0368519468.

The spelling of 320065231 in words is "three hundred twenty million, sixty-five thousand, two hundred thirty-one".