320112731 has 2 divisors, whose sum is σ = 320112732. Its totient is φ = 320112730.

The previous prime is 320112719. The next prime is 320112743. The reversal of 320112731 is 137211023.

It is a balanced prime because it is at equal distance from previous prime (320112719) and next prime (320112743).

It is a cyclic number.

It is not a de Polignac number, because 320112731 - 2¹⁰ = 320111707 is a prime.

It is a super-2 number, since 2×320112731² = 204944321096556722, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (320112031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160056365 + 160056366.

It is an arithmetic number, because the mean of its divisors is an integer number (160056366).

Almost surely, 2^320112731 is an apocalyptic number.

320112731 is a deficient number, since it is larger than the sum of its proper divisors (1).

320112731 is an equidigital number, since it uses as much as digits as its factorization.

320112731 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 252, while the sum is 20.

The square root of 320112731 is about 17891.6944697812. The cubic root of 320112731 is about 684.0706889484.

Adding to 320112731 its reverse (137211023), we get a palindrome (457323754).

The spelling of 320112731 in words is "three hundred twenty million, one hundred twelve thousand, seven hundred thirty-one".