320311431 has 24 divisors (see below), whose sum is σ = 506638080. Its totient is φ = 193395600.

The previous prime is 320311417. The next prime is 320311447. The reversal of 320311431 is 134113023.

320311431 is a `hidden beast` number, since 320 + 311 + 4 + 31 = 666.

It is not a de Polignac number, because 320311431 - 2⁹ = 320310919 is a prime.

It is a super-2 number, since 2×320311431² = 205198825658535522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320311031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20860 + ... + 32798.

It is an arithmetic number, because the mean of its divisors is an integer number (21109920).

Almost surely, 2^320311431 is an apocalyptic number.

320311431 is a deficient number, since it is larger than the sum of its proper divisors (186326649).

320311431 is a wasteful number, since it uses less digits than its factorization.

320311431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12227 (or 12224 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 320311431 is about 17897.2464641911. The cubic root of 320311431 is about 684.2121981926.

Adding to 320311431 its reverse (134113023), we get a palindrome (454424454).

The spelling of 320311431 in words is "three hundred twenty million, three hundred eleven thousand, four hundred thirty-one".