320116731 has 16 divisors (see below), whose sum is σ = 490131840. Its totient is φ = 183798720.

The previous prime is 320116697. The next prime is 320116763. The reversal of 320116731 is 137611023.

It is not a de Polignac number, because 320116731 - 2¹³ = 320108539 is a prime.

It is a super-2 number, since 2×320116731² = 204949442932252722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (320116031) 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, 254650 + ... + 255903.

It is an arithmetic number, because the mean of its divisors is an integer number (30633240).

Almost surely, 2^320116731 is an apocalyptic number.

320116731 is a deficient number, since it is larger than the sum of its proper divisors (170015109).

320116731 is a wasteful number, since it uses less digits than its factorization.

320116731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 510586.

The product of its (nonzero) digits is 756, while the sum is 24.

The square root of 320116731 is about 17891.8062531428. The cubic root of 320116731 is about 684.0735382273.

Adding to 320116731 its reverse (137611023), we get a palindrome (457727754).

The spelling of 320116731 in words is "three hundred twenty million, one hundred sixteen thousand, seven hundred thirty-one".