320115531 has 8 divisors (see below), whose sum is σ = 427203280. Its totient is φ = 213219072.

The previous prime is 320115529. The next prime is 320115547. The reversal of 320115531 is 135511023.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 320115531 - 2¹ = 320115529 is a prime.

It is a super-2 number, since 2×320115531² = 204947906374823922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 320115498 and 320115507.

It is not an unprimeable number, because it can be changed into a prime (320115511) 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 7 ways as a sum of consecutive naturals, for example, 43870 + ... + 50643.

It is an arithmetic number, because the mean of its divisors is an integer number (53400410).

Almost surely, 2^320115531 is an apocalyptic number.

320115531 is a deficient number, since it is larger than the sum of its proper divisors (107087749).

320115531 is a wasteful number, since it uses less digits than its factorization.

320115531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95645.

The product of its (nonzero) digits is 450, while the sum is 21.

The square root of 320115531 is about 17891.7727182077. The cubic root of 320115531 is about 684.0726834461.

Adding to 320115531 its reverse (135511023), we get a palindrome (455626554).

The spelling of 320115531 in words is "three hundred twenty million, one hundred fifteen thousand, five hundred thirty-one".