320345015531 has 8 divisors (see below), whose sum is σ = 339195190320. Its totient is φ = 301495546368.

The previous prime is 320345015437. The next prime is 320345015539. The reversal of 320345015531 is 135510543023.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-320345015531 is a prime.

It is a super-2 number, since 2×320345015531² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (320345015539) 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 7 ways as a sum of consecutive naturals, for example, 971900 + ... + 1259078.

It is an arithmetic number, because the mean of its divisors is an integer number (42399398790).

Almost surely, 2^320345015531 is an apocalyptic number.

320345015531 is a deficient number, since it is larger than the sum of its proper divisors (18850174789).

320345015531 is a wasteful number, since it uses less digits than its factorization.

320345015531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 352813.

The product of its (nonzero) digits is 27000, while the sum is 32.

Adding to 320345015531 its reverse (135510543023), we get a palindrome (455855558554).

The spelling of 320345015531 in words is "three hundred twenty billion, three hundred forty-five million, fifteen thousand, five hundred thirty-one".