320113431 has 16 divisors (see below), whose sum is σ = 517355520. Its totient is φ = 194007960.

The previous prime is 320113429. The next prime is 320113433. The reversal of 320113431 is 134311023.

320113431 is a `hidden beast` number, since 320 + 1 + 1 + 343 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (320113429) and next prime (320113433).

It is not a de Polignac number, because 320113431 - 2¹ = 320113429 is a prime.

It is a super-2 number, since 2×320113431² = 204945217413183522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320113433) 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 15 ways as a sum of consecutive naturals, for example, 538615 + ... + 539208.

It is an arithmetic number, because the mean of its divisors is an integer number (32334720).

Almost surely, 2^320113431 is an apocalyptic number.

320113431 is a deficient number, since it is larger than the sum of its proper divisors (197242089).

320113431 is a wasteful number, since it uses less digits than its factorization.

320113431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1077843 (or 1077837 counting only the distinct ones).

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

The square root of 320113431 is about 17891.7140319199. The cubic root of 320113431 is about 684.0711875739.

Adding to 320113431 its reverse (134311023), we get a palindrome (454424454).

The spelling of 320113431 in words is "three hundred twenty million, one hundred thirteen thousand, four hundred thirty-one".