320013158731 has 16 divisors (see below), whose sum is σ = 388831186944. Its totient is φ = 257420633184.

The previous prime is 320013158723. The next prime is 320013158797. The reversal of 320013158731 is 137851310023.

It is a cyclic number.

It is not a de Polignac number, because 320013158731 - 2³ = 320013158723 is a prime.

It is a super-2 number, since 2×320013158731² (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 (320013158711) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18742971 + ... + 18760036.

It is an arithmetic number, because the mean of its divisors is an integer number (24301949184).

Almost surely, 2^320013158731 is an apocalyptic number.

320013158731 is a deficient number, since it is larger than the sum of its proper divisors (68818028213).

320013158731 is a wasteful number, since it uses less digits than its factorization.

320013158731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37503090.

The product of its (nonzero) digits is 15120, while the sum is 34.

Adding to 320013158731 its reverse (137851310023), we get a palindrome (457864468754).

The spelling of 320013158731 in words is "three hundred twenty billion, thirteen million, one hundred fifty-eight thousand, seven hundred thirty-one".